As I'm sure you all have noticed, someone has been changing tags to incorrect types recently (the one I can recall is artist_request, but there were more).
At first I didn't think that this was vandalism but rather just some idiot, but it's happening way too frequently. Today I even noticed that peeing had been changed to a character tag. Nobody with even a lick of common sense would do that honestly, it has to be purposeful vandalism. There was also another tag I came across yesterday that was incorrectly changed to an artist type, but I can't recall what it was as I fixed it and moved on.
I think it's time we had a way of tracking tag type changes. Probably only accessible by staff. Not just to track vandals, but also to make it easier to correct common newbie mistakes. I can't count the number of times I've had to change jam back to a general tag, for instance, because people keep confusing it with jam_(artist).
Updated by 葉月