I agree with those of you who have expressed concern about this “opportunity.”
They could be using this to create lists of dissidents for later use and it won’t be to help you get those grievances fixed.
The system can also be used to create false statistics like this — we had this petition up and only 0.1% of the populatioon are opposed to blah blah (meaning 99.9% are in favor.) So I would be very cautious, maybe sign in from a location that does not reveal your IP address and sign as Harry Reid or Nancy Pelosi. :)
Or if you really want to twist the knife, David Letterman or Chris Matthews.