Historical revisionism

I have spotted a worrying trend with one of the email lists I archive. So far I have fielded about ten requests to remove emails from the archive, with four of those being in the last couple of weeks. I wont name the offenders, but handling these requests takes a fair bit of time on my part. So, I ask for opinions. Should I be deleting emails from a public archive, given the mailing list is open to subscription from anyone? Does it matter that this is a third party archive, and I am not the list administrator? Should people think before they post?

Given the long memory of search engines, and the increasing probability of an employer Googling for you before hiring, I wonder if this sort of request is going to become so common that it endangers the public archival of things like mailing lists?

A penny for your thoughts…