Except that it would just get stupid if you started flagging people for autoassisting their groupmates when said groupmate gets attacked. People whine enough about warrants they feel are undeserved, how bad would that end up being?

The issue Arlettien has is that your second point was enforced. He ended up fighting a magistrate out of his jurisdiction, which according to the rules of the spire (in the books in the spire) is the only time they can flag out of their jurisdiction.