Trade server last I checked.
Since taunts are part of of the pretentious crap that is traded daily, there is no reason to ban them as more are on the way from Valve and the TF2 team. Some people like a demonstration before the offers fly or the haggling.
While I can understand that the taunt itself can grow out of control and annoying, unless you can find means of doing a local mute on them, or finding some way to disable the taunt sounds (I'm uncertain if its mod related or game option related), its a minor problem, that can usually be solved by having the engineers be smitten. How? I don't know, roll the dice and hope you get No-Clip, wait for someone to push him out into a means of getting killed, moderator/admin begins reclaiming souls...list goes on.
Not a problem that we need to ban for as of yet. (The pan was a special case.)