Technically this thread is the only list of "allowed" UserScripts (Since I was a moderator at the time of making it) - and anything else that's not here is considered "illegal".
2nd one of which list lol.
The list has been updated since that was said. A lot of scripts are now disabled and merged into one :
This one is now 2nd on the list. I've yet to get an answer on if its "legal"