The problem is that you do not know on first sight if they are just misguided or actually malicious. I remember a few names of the worst offenders that I just

The problem is that you do not know on first sight if they are just misguided or actually malicious. I remember a few names of the worst offenders that I just ignore now but it sucks anyways. Edit: Using Stylus, the following solution is possible to highlight the names of selected people (the list needs to be updated when you want to add someone): a[href$="username1"], a[href$="username2"], ... { color: darkred !important; } Hiding the sub-thread in a similarly easy way is not possible though, due to the nature of the tree.