So tell me how would you manage disposable bots? If they wanted they could even make a character (to bot on) use it for a few days/months, and manually delete the character, SE's logs would say that character ID has been deleted (you know on your blacklist, the RMT tell bots that are listed as "deleted" are all manually deleted characters) this would then end any investigation into the character. They could then make a new character maybe even using the same name, but if the ID is different SE cannot know it's the same person behind the keyboard.