I can't be absolutely sure of this because I didn't create the bot, but it sounds like the perfect use for Jonathan Wainwright's bots. Why don't you contact him and ask if he could create one to remove all the bad sources across your watchlist?
By the way, the same bot, could also add a statement of your choosing at a location of your choosing on each profile - something like "corrective work is currently in process" or whatever you want it to say.