I think RuneScape (or old school runescape) used to do this as well, if your account was flagged for botting you'd be silently placed in a hidden world (and una

I think RuneScape (or old school runescape) used to do this as well, if your account was flagged for botting you'd be silently placed in a hidden world (and unable to join other worlds) with other botters so they could better keep an eye on you.