Hah.
I've signed quite a few petitions on that site; and it's really a cool site, but, in the end, once you get the signatures the usual response is "Thanks, but here's why we won't be doing this." or "Thanks, but here's what we're already doing that we're saying is similar to what you want but really isn't" or "Thanks, but here's what's already on the books that's kinda like that."
Irregardless, I signed.