Things have changed quite a bit since Melee. The only two true "infinites" were wobbles and Fox Shine on a wall. Unlike the Infinites we see in Brawl, these actually required some modicum of skill, also, in the case of Fox Shineinfinite, you needed a wall. Wall's only existed in 2/4 forms of Pkmn Snadium (some tournaments had Onett and Castle as a CP, I never experienced that, though. Not to mention it was usually pretty hard to get a Marth into a corner on Fire form of Pkmn Stadium without unplugging his controller. Wobbles was something else entirely, could be done on any character, at most percents, anywhere on the map, and against a good player, a grab meant your stock(watch MLG from 06-07) so many tournaments started to ban Wobbles (like the CPP tourny this satuday)
In Brawl however, if a Dedede grabs you on Eldin, you're stock is gone, if a DK grabs you anywhere NEAR a wall, your stock is gone(cargo dthrow infinite) There are a LOT more infinites in Brawl, and so far all of them are stupid easy to execute. So now we're in a very tricky situation because so many characters have infinites or near infinites, who can be the judge of what is fair and what is banned.
p.s. brawl sucks lawl