Spammers, trolls, and ban evaders often use temporary email addresses. PieFed now checks a list of known temporary email providers and displays a warning icon next to registrations that use such services.
If registration mode is set to "Open" (no approval needed) then the site admin(s) receive a notification instead.
A throwaway email address isn't always a bad thing but it's one factor that admins might want to take into account.
You say it's 50/50 based on your own experience/anecdotal evidence. Admins will probably be able to make that determination with a much greater deal of accuracy based on what they see happening on their instance. So it makes sense to leave the choice to them/enable them to make that choice, right?
True, I failed to mention that I think there could be a setting to enable the feature, or dismiss the warning per-account. @[email protected] maybe consider this?
Sure