Okay I've finally gone through all that smilie garbage and deleted around 450 duplicate, faulty or just stupid smilies and emojis.
There's no way to do any mass deletions without running a database query and I'm not risking crashing the site by doing that.
I also reordered the categories putting garbage such as "deaf pride" at the bottom along with the flags and some other internetking crap far too numerous to take all day deleting one at a time.
He was able to load so much shit because while you can't mass delete any of this, you can upload prepackaged smiley and emoji packs and literally fill it with mounds of garbage.
Anyhow it's much better now, there's still far too much shit in there and probably still more duplicates, but enjoy. I'll continue patrolling for dupes.
You may resume shaving your back.