I haven't used them because I use the quick reply box, which doesn't have the bbcode or whatever for them, so I don't know how.
But I don't think they should be removed. As in the old days of ZFGC, it's the unique, animated smilies that give it a lot of flavor. Anyone remember the giant robot that we had back when TRM was admin back in the day? Just give them some time to let the novelty wear off, and they'll stop being overused.
They are excellent smilies though, and shouldn't be removed.