Thanks Spuds! You saved us all. It works! No more guest trying to log in!
Bye bye botters! lol This should now really be pre-installed with smf.
The thing is, the Tor service is not guilty for this... It's a proxy service with many uses, and it's being used at the moment by the network of malicious users, but that can end tomorrow for all we know. Unfortunately, yes, it is used heavily at the moment on a number of forums, and quick action like blocking it for now it obviously useful.
Thank you, Spuds, for working on this. Don't worry about being a duplicate of sorts, I did the same as you, LOL, and just worked on something similar.
In the situation out there, it's needed... and I can confirm from quite a number of forums I checked that it's needed for Tor only, at the moment.
ETA: 8 replies behind! Man, I'm slow.