Comment 1 for bug 357340

This would be grand indeed. One issue is that a lot of these same people also typo unsubscribe so you'd really have to account for those for this to be useful. Also, sometimes people ask other things like "please remove". I think a bayesian filtering approach could go a long way here, picking up on the key words and the length of an email which determines someone wanting to be removed. These could then go a moderators list where the owner of the list either unsubscribes them or marks it as legitimate and the email continues on.