I believe in retaliation, but not immediate retaliation. If the series reaches a point of hopelessness, then, yeah, revenge meant to wreck the Heat's championship chances should be on the table. If not, then save it for next season. I can wait a year for KG to make his little incident with Channing Frye seem like a game of patty cake.
Of course, the thing that is probably saving Garnett from doing something that earns a suspension is his opposite number, Chris Bosh, having a pair of undescended testicles.