Comment by quaddo

Circa 1997 a coworker lamented that he had signed up for some email list, and attempts to unsubscribe weren’t working (more of a manual thing, IIRC). I made the suggestion to set up a cronjob to run hourly, to send an email request to be unsubscribed. It would source a text file containing the request to be unsubscribed. And with each iteration, it would duplicate the text from the file, effectively a geometric progression. The list owner responded about a week or so later, rather urgently requesting that my coworker cut it out, saying that he would remove him from the list. Apparently the list owner had been away on vacation the entire time.