When an idiot comes along and spams twenty pages on my site, I can easily roll it back. But all changes are recorded for posterity in the log files, and therefore they appear on RecentChanges and thus also in the RSS feed. Too bad!
Unfortunatly simplistic schemes won’t work: I cannot skip all entries whose last edit was a rollback. I need to figure out what edits where undone by the rollback and then check whether there are any remaining edits in the current time window… Damn!