I do think tags like this should be opt-in.
During the banned period I removed most of my muted tags to help notice questionable topics, but I do get queasy from some of this content so I muted them again.
Definitely agree that searching for how to block tags would be the correct response, but bigcheater is a very new user and may not be used to the forum structure with the search and categories.
Hopefully we can all understand the feelings at play; both the disgust and the frustration over the unproductive way that disgust was displayed.