i'm running a fairly large forum (Members: 3,233 Threads: 11,169 Posts: 89,150) as a community for an overclocking and casemodding webshop here in Belgium.
We are having problems with the bandwith a month since a month or 2, and it seems that 4/5 of the users on the forum are guests. Since guests have no rights

i want to disable displaying signatures and avatars for guests. I think this will help bring down the bandwith.
I'm not able to find a way how in the CP so i guess it has to be modded. Anyone has an idea how?