What is a proxy ban?

Is it that a member is accidentally getting banned because s/he appears to be some banned member or is it that such member is getting around their having had been banned because they are using a VPN or some other method of connecting to the forum?

If there is an accusation of wrong behavior or just information that such member is being "innocently" caught up in some wrong accusations, and surely PowerGlove is still active..

For sure, I am not very familiar with how to use some of the scam, spam or other ways that members might have accounts that are potentially of previously banned members.. or if they might be using services that cause them to be confused with previously banned members.. even though sometimes personality and/or writing pattern (substance) might "give some clues" in terms of if members might have been previously banned or just mistakenly associated with previously banned members.