I've tried browsing through my Control Panel and I've made it set that the avatars, signatures and pictures will be hidden. The following is my current settings:
I've tried also looking at the usergroups panel but there are no settings where you can hide the pictures of the membergroups.
Problem is that, the membership groups' avatars of each user are still visible all throughout the forums. Like this:
Personally, I prefer that that next to all images will be hidden so that loading of a page would be much faster as our internet is one of the slowest in the world.
Hope forum admins (Q?) can make necessary tweaks to make this possible.