What can be done from the level of an administrator, is that sections as "Development & Technical Discussion" and "Technical Support" will not be showing a signature.
That's reason for campaigns to remove these sections from the for payment eligible sections.
Quite often people ask for support hoping for a helpful answer, but instead they get nothing more than nonsense answers from sig posters.
This issue/suggestion has already been brought up:
I think the best way to find some sort of balance is to limit which part of the forum sig campaigners can post. The Bitcoin Discussion section should be definitely off limits to sig campaigns. The quality of posts there are at the lowest and I tend to avoid that section.
If there was only a way to have the signatures disabled in some sections and on in others. That would save a lot of mods some work if they plan on cleaning the forum up.
This is something I've suggested. I know a big peeve of DannyHamilton is people giving bad advice/help so maybe we could disable sigs in the main Bitcoin Discussion and Technical Help subs. Campaigns would then likely not pay for those boards and the content would be significantly improved because nobody is posting just to get paid. On the other hand, if posts in there still contribute to postcount account farmers wont be effected but maybe they would find easier boards to spam which keeps the crap out of the most important boards.