The most passionate of Hiaasen's columns often concern politics, corruption, and the environment—in Florida, three closely related topics. Many of his colleagues believe, in fact, that Hiaasen's deep-rooted attachment to South Florida enables him to write with genuine lyricism about the Everglades, and with uniquely venomous, wickedly funny satire about those "greedheads," as Hiaasen calls them, whose make-a-buck morality has led to widespread environmental destruction.

Sometimes Hiaasen is brutally direct, calling one well-known Miami politician "a pernicious little ferret," another, a "worthless blowhard," and a third, "an affable, back-slapping, ribbon-snipping blob." Sometimes he chooses images to emphasize venality—certain legislators are, for example, the "favorite slobbering lapdogs" of canegrowers, and Hialeah's government is an "oozing sludge bucket of corruption," where "the air of graft and deception comes from deep in the soil, like radon gas." He skewers local- and state-level candidates as well, during one election referring to them as "a veritable slag heap of mediocrity" and wondering, "What is it about South Florida that compels people barely fit to function in society to go out and run for office?" However, because Hiaasen doesn't play favorites, he also attacks the "rich tradition of voter apathy, rotten judgment and shallow values" allowing corrupt or unqualified candidates to gain office in the first place, so close to taxpayers' money and so indifferent to their interests.

Although Hiaasen never hesitates to use what Clifton refers to as "a cauterizing light," his satire can also be clearly fun-loving and equally effective in its various other forms—spoofs, invented conversations, lists of rules, questionnaires and surveys, predictions for the new year, diary entries, multiple-choice tests, and song lyrics, like these from February 1990, commemorating Governor Martinez's condemnation of the rap group 2 Live Crew. (The group was busted four months later by Broward Sheriff Nick Navarro, who sent a dozen county cars to "capture" the rappers, inspiring Hiaasen to comment, "Liberal wimps have chastised Navarro for using so many deputies on the 2 Live Crew raid. [But] it's not as if crime is a problem in Broward. Last year the county reported a measly 115 murders, 830 sexual assaults, 5,212 robberies, 6,202 aggravated assaults, 25,478 burglaries, 11,190 auto thefts and 59,541 larcenies … No wonder Navarro could spare a fleet of squad cars to pursue an unarmed musician!")

At his funniest and most playful, Hiaasen still remains dedicated to what he considers his responsibility to the public—being straightforward and up-front. "A columnist is paid to take a stand. If a reader can't figure out how I feel about something, then I don't deserve to take my paycheck home that week, because I copped out," Hiaasen says. "I feel strongly about the advocacy role of the columnist."

Certainly, he has never shied away from directly tackling issues in the public interest, even when doing so cost the Herald money, as in 1994 when the Lennar Corporation, implicated in the construction scandals following Hurricane Andrew, withdrew advertising because Hiaasen lambasted his own newspaper for promoting Lennar's new home giveaway contest. "According to an exciting full-page advertisement," he wrote, "a lucky reader will win Lennar's 'Home of the Future.' This is not to be confused with Lennar's 'homes of the past,' many of which splintered like Popsicle sticks during Hurricane Andrew." Particularly scathing, this column suggests that, as a "marvel of modern engineering," the home of the future might be made of shingles "actually nailed to the roofs," gables "actually anchored to the walls," real plywood in place of "pressed fiber-board," and might therefore remain "vertical, even in 100-mile per hour winds." (Interestingly, two years later, Hiaasen again had occasion to write about Lennar Homes, when sinkholes full of trash opened up behind houses in a Miramar subdivision the company had built. After 250 truckloads of "tires, rotting tree limbs, rusty appliances and construction debris" were hauled away, the remaining pit filled with brown water and had to be fenced.)

Despite its loss of a major advertiser, the Herald never told Hiaasen to stop writing about Lennar, even though "at many, many other newspapers there would have been a heel on the back of my neck to lay off," he says. The Herald also printed Hiaasen's criticism of the newspaper's then-publisher, Dave Lawrence, when he contemplated running for governor in 1998. While praising Lawrence as a "smart, decent, compassionate fellow who cares about Florida and believes fervently in the innate goodness of mankind," Hiaasen also vigorously objected to the "untenable and queasy position" his candidacy would have created for "this newspaper, the reporters, columnists and editors who produce it." Anything Herald staffers wrote about Lawrence or his opponent, Hiaasen pointed out, could have been perceived as coming from "Lawrence's personal campaign machine," and not from the independent voices the public was entitled to hear.

"What would our readers have thought if I stayed silent? I couldn't. The only way I knew to let our readers know it's business as usual was to do the same kind of tough column on Dave I would do on anyone," Hiaasen says. "It put us in a helluva position." The column in which he takes on his own boss (who was less surprised perhaps than others at the Herald, Hiaasen says, and who remains to this day a friend) begins with that customary punch:

Although Hiaasen claims he took no real risks in criticizing his own publisher, such columns illustrate why former city editor Dave Satterfield likens their impact to "a baseball bat to the forehead." Calling him "one of the strongest voices in Miami," Satterfield says that because Hiaasen looks at issues in terms of right and wrong rather than according to some narrower agenda, he appeals to a wide readership. "He's looked up to throughout the community not only to be the voice of reason, but to deliver," Satterfield says. "You can cross any of those racial, ethnic divides in Miami and everyone agrees, 'Boy, Carl hit the nail on the head.' He has a very good sense of what's right."