I have decided to block some IP ranges too:
Each of those IP ranges generated over a million requests since December, 6th to today.
Many of those IP are mapped to sbcglobal.net - I can't exclude blocking the access to sbcglobal.net altogether for the next 15 days.
In March, when my upstream traffic counter will be reset, I'll consider re-enabling those ip ranges.
In the meantime, you can look in the search engines for some other phpGrabComics servers.
There are not many around - but I could find this one. Not sure of how many of the comics would work, because it's a quite old version of phpGrabComics. If you are running a phpGrabComics server, please share your link...