If memory serves, there is a setting or a mod where you can limit any sig to one time in a thread. I haven't been in the back office of VB3 in some time but I do know that's used at the computer forum I admin at. You could ask the owner Buzzstpoint about it if you don't get a responce here.
www.computervitals.com. Tell him seti sent you over.
That just might serve as an alternative to canning them altogether.