I sure get that. It brings the question what can moderators do at signups ?
So, you get a bunch of new users “on hold” because they use a VPN. But then what ?
Wouldn’t it be better to follow a little more closely what these users (using a VPN) are saying/doing ? Without them knowing. Maybe by using the Data Explorer Plugin to spot VPN users, and then follow these users (+fingerprinting +other measures).
EDIT: It would also be better for legitimate VPN users (no hold period or any extra inconvenience) and less work for moderators.