Why would an illegal register to vote, unless they actually planned to vote?
"Social pressure." No kidding, that's what they're rolling out. Peer pressure. Because ALL the really cool kids are registering to vote, but don't actually go vote. It's just WAY HIP to say you're registered. It's like underage drinking or smoking or experimenting with drugs. Social pressure, man, gets you every time. Makes you do stuff you would NEVER consider.
In some cases like California they have no choice when you get a drivers license you are automatically registered. Motor Voter.