Not sure how easy this would be to do but If a member has permission for a forum and follows a few topics and then looses permission shouldn't that member also no longer receive notifications from followed topics?

Haven't tested that myself but if it's true then it's probably a bug :rofl:

Oh I will post it as a bug then.

Have you actually tested this? Because there is permission checking.

Please don't post bugs based on speculation. :)

Nope not speculation I am following threads on here that I do not have permission to and getting the email notifications of replies.