I have been thinking and noticed that vBulletin has this option, and possibly should be added to a mod in SMF 1.1.x - 2.0 RC series. Basically if the forum was compromised through an exploit or some other malicious method, or if an admin just wants to improve security by forcing password changes every 6 months or so, I believe a mod should be created that If activated the next time a user logs in it redirects to a page where the user is forced to change their password.This will help improve loads of security on SMF, especially due to the last avatar exploit found in 1.1.8. Anyone have any interest in this or think this is a good idea for a mod?