User blog comment:SsVivid/Evaluating Categories/@comment-4909238-20120602160640/@comment-4536066-20120613190349

I think they should be removed, yes, but it's my understanding that, aside from going through and actively removing such categories from every listed page, categories can't be deleted. Or, at least, that's what Zaox lead me to believe.

The only real alternative is to raise awareness of what categories are appropriate and what categories aren't, so that people understand how better to use them.