[quote=@Prince of Seraphs]
Maybe this isn't the place for it but someone tagged me in a post then got themselves banned and now that post is stuck in my notices box because I can't actually view it. Can someone do something about that?
[/quote]

There should be a button to clear all notifications and a button to delete individual notifications. Those shall be your solution for now (unless they're broken, in which case Mahz or someone else would need to fix it).

But speaking of that, maybe Mahz could make a small patch to make notifications automatically disappear if the target post is deleted/hidden/made inaccessible?