I’ve been following the number of voter registrations in the state of Wisconsin for a long time now (http://www.john-brandenburg.com/blog/482000-de-registered-voters-wisconsin-2016), and that state in particular has seen a number of large voter purges over the last few years. There are plenty of legitimate reasons to purge voters from the roles, but the concern is that some nefarious purges might be masquerading as legitimate. There have been several large news stories about voter purging over the last few years. States where this seems to be a recurring problem are Wisconsin, Georgia, North Carolina, and Texas. Back in 2016, New York State was even under scrutiny over purging 126,000 voters
Florida, Georgia, North Carolina Still Purging Voters at High Rates
https://www.brennancenter.org/blog/florida-georgia-north-carolina-still-purging-voters-high-rates
These purges are all implemented under the condition that they are to clean up the roles. Without anecdotal information, it is difficult to back that up. But then anecdotes are just that, anecdotes.
92-Year-Old Georgia Voter Blocked
https://www.gregpalast.com/92-year-old-georgia-grandmother-purged-from-voter-rolls/
Georgia NPR Investigation: 6 Takeaways From Georgia's 'Use It Or Lose It' Voter Purge Investigation https://www.npr.org/2018/10/22/659591998/6-takeaways-from-georgias-use-it-or-lose-it-voter-purge-investigation
Texas Republicans Are Lying About Voter Fraud to Justify a Massive, Racist Voter Purge
https://slate.com/news-and-politics/2019/02/texas-republicans-racist-illegal-voters-purge.html
Texas Sec of State resigns after botched attempt to purge voters
17 Million Americans Purged From Voter Rolls Between 2016 and 2018, Analysis Finds
Kentucky Democrats say state "improperly" deactivated 150,000 voters weeks before election