When Wikipedia had this problem they just blocked edit access from Tor exit nodes: https://secure.wikimedia.org/wikipedia/meta/wiki/Editing_with_Tor https://se

When Wikipedia had this problem they just blocked edit access from Tor exit nodes: https://secure.wikimedia.org/wikipedia/meta/wiki/Editing_with_Tor https://secure.wikimedia.org/wikipedia/meta/wiki/Editing_wit... Seems like a more measured response than outright blocking of everything.