It seems to me that if you remove someone from the voter rolls who previously signed up, the absolute minimum is that you have firm evidence that the person is indeed ineligible. Maybe they became ineligible due to a court verdict, or they died, or there's a later claim of non-citizenship.
Pat RaceWow. This is getting pretty sketchy. The Alaska Division of elections used outdated data to justify removing a bunch of citizens from the voter roles and given the opportunity to fix it they were just, like, nope.