Andy Kitkowski, the Blockem plugin is installed on rpgtable.top, but using it isn’t all that intuitive. Instead of, say, right clicking on the user and saying “ignore”, you have to go into your own settings, get to the “Add-ons” section, go to the “Blockem” section, then add the person you want to block to a blacklist.

There is also a content filter plugin installed that works similarly, but using keywords instead of users.