Requested feature overview description.
The feature would be a togglable option on the side of the comments, like how the blacklist toggling system works in searches. This will do the same with comments in regards to comment chains and general comments that appearing on works which have tags on your blacklist. Therefore, you can toggle whether or not new comments on posts you've blacklisted will display

Why would it be useful?
Just like with the regular search blacklisting function, having a toggling system to completely hide it, rather than using the "blacklisted" replacement image on top of the picture, will help people avoid blacklist content entirely. It would also eliminate the possibility of glancing at comments related to blacklist content. Also, bit of a personal add on: I have really intense impulse control problems because of disorders, and having a blacklist that removes possible content that I hate but have the compulsion to seek out does wonders; also it helps for people just genuinely avoiding the urge to see things they're trying to avoid, impulse problems or not.

What part(s) of the site page(s) are affected?
Comments page