Tags (even offensive ones) are a sort of "double-edged sword", I am discovering. If someone makes or frequently uses a tag that is unacceptable (to me), the tagging system is a way for me to quickly "take care of it". I just do a filter on that tag, see if it is being used by a particular user (or users) and depending on how that tag is being used/abused, I can either hide all of the topics that have that tag, or even mute the user(s) who are abusing it. Not only does that get those topics (and users) out of my sight, but I would imagine that it feeds into the "global mute" system that Achronos spoke of.