In part i agree with Feito, i think most tag are useless like clothes or stuff, but like peto said, if someone is willing to use and mantain them, i'm fine with it. I still use artist/circle/copyright myself when uploading, but if a user would like to search for something more specific why shouldn't he. If we start to delete posts or ban people just based on "i don't like this tag" we're gonna really get like danbooru is.