Steve Boone of Media Vandalism and Spout writes the best review of TT I have read so far

The Village Voice’s Robert Willonsky is dead right that Tropic Thunder amounts to little more than Stiller “nibbling gently at the soft, manicured hands that feed him.” Stiller’s old satirical TV show and The Cable Guy may mark him as a pioneer of some sort, but his industry sanction, hookups and increasing budgets insure that the nibbling will only get softer. The real insurgency has been going on for years, on YouTube and other outlets, by filmmakers who understand Ho’wood’s follies just as intimately but have nothing to lose by rendering them in merciless detail. The only insider who would have dared is another shaggy Nolte lookalike, long dead: Hal Ashby.

A library could be written on the rightness or wrongness of biting the hand that feeds you, of burning the bridges you worked so hard to cross. The numbers are against it but dammit, it sure is nice when some ballsy rascal comes along not only biting said hand, but effin near dehands them.