It seems like a bad idea to track where traffic is coming from when a person is signing up to vote. We know the sort of opponent in this endeavor, why give them the ability to start determining who might have papers or information get accidentally lost in the application process?
Easily. You’d just have to use it to push your orbit in the right direction at the right time. If you are like Pluto, and way out there with a very eccentric orbit, unfurling the sail as you are heading into the galaxy might make your orbit path curve through the sun itself.