The kind of dedicated habitual abuser bawolff is talking about will also use an endless series of free/cheap VPSes an VPN services, at least the subset of ones

The kind of dedicated habitual abuser bawolff is talking about will also use an endless series of free/cheap VPSes an VPN services, at least the subset of ones that might also use tor. So yes, letting them get away with tor some will let them in a little more, but not a huge qualitative change to not allowing them to do so. Not allowing the access, however, blocks a significant amount of legitimate contributions too.