A level in which people against the banana use and promote the non-banana just as much; Anyone see the contradiction?
How about, just wait till it gets old, and have posts with over banana'ness moderated as spam in the same way as they normally would.
Now, the bananalink is yours, and under the zfgc ownership orientated 'sprite laws', you can (unless the emote competition rules stated otherwise) prohibit people from using it in their signature and avatar, not modified or even if so, and the staff of zfgc will assist in correction of said violation; This is a result of the graphically active invision zfgc days when sprite ownership was an incredibly difficult thing and there was alot of flaming and difficulty - Many rules had to be put in place, and they are still arguable today to the prevention of flame wars, although the graphical activity of thr forum is very bleak to what it once was.
IF the emote comp stated otherwise, such that zfgc owned the sprites for example, which may have been done as a precaution based on other past events (DJvenom bless him), then zfgc could enforce such a rule, and correct it, though you would have to propose such action and get the staff to agree completely and set up some definate on/off guidelines.
But a war styled anti this anti that fad, is just going to provoke more !@#$% back in your direction.
Its the anti-fad that sparks and gives the fad something to be a fad about. Aye, the fundamental paradox of fad!
Alternatively - Let die, because it won't be new forever, and over use of such media in posts will be removed as spamming in general anyway.