Bile Fascination: The only reason some people read it. There are a number of blogs devoted solely to reading Tinsley's strips just so they can mock them. Mocking Mallard Fillmore was in fact the genesis of SomethingAwful's political cartoons thread, which has seen expanded to include other editorial cartoons and resulted in a number of off-shoot blogs.
Don't Shoot the Message: To some politically-moderate readers, Tinsley's viewpoints are on occasion quite reasonable, but his method of delivery distorts them so horribly that they despise the strip anyway.
Informed Real Life Fame: Tinsley did a week-long series of strips promoting the drafting of conservative economist Walter E. Williams as the 2008 Republican presidential nominee. In the strips, he depicted the groundswell of popular support for Williams' drafting as being so huge that it causes a frightened Howard Dean (who was Chairman of the DNC at the time) to throw a tantrum out of frustration. In reality, Williams was little-known other than by hardcore listeners of the Rush Limbaugh Show where he sometimes guest-hosted when Limbaugh was on vacation.
Unfortunate Implications: Tinsley did not take kindly to a parody strip done for Jon Stewart's America (The Book). He responded by dedicating several actual strips to complaining about Stewart "stealing" his work, culminating with a rather disturbing Jewish caricature of Stewart◊ proclaiming himself a pedophile, with a "Just Joking" Justification disclaimer. Tinsley (who apparently does not grasp the idea of "satire") did not get the overall joke, as the strip was on a page with other comic parodies, including a similar mocking of rival strip Doonesbury (along the same lines as too political and unfunny) and even Peanuts (which, of course, was never a political strip). Incidentally, the Fillmore parody wasn't drawn or written by Stewart himself, but by Maria Schneider (a cartoonist who also writes for The Onion).
Tinsley's response to the controversy? "Honestly, I didn't even know Jon Stewart was Jewish."