There should be a support button on every Suggestions and Ideas forum. What it does is it says how many people support your forum. It will be more easy than having to read all the threads that say they support your idea.
Actually. No matter how many "Supports" one subject would get, an administrator would have to OK it. Because i mean, Look at all the guest haters. *One makes an anti-guest thread, all the guest haters support, Nothing would happen*