So, obviously it wasn't always the case, but for a while now people can block reactions and reviews when they block someone.
I think this is a bad idea because it can effectively be abused to make a content creator or their content appear more liked or more popular than they are. And it also can be abused by people who are leaving reviews, to make their reviews likewise seem more liked than they are.
Scenario: Someone writes a dumbass review (or consistently writes dumbass reviews). People effectively downvote this review via their reactions. Snowflake reviewer blocks everyone who gave them a negative reaction smiley, thus giving the illusion everybody agreed with them, and falsely inflating their review's perceived popularity.
Scenario: Snowflake content creator can't handle constructive criticism or anything but asskissing reviews. Snowflake creator blocks everyone who gave them a sufficiently negative review, even if earned. Again, this leaves only positive or asskissing reviews, thereby giving the illusion of greater popularity than a submission otherwise deserves. Yes you still have the star rating system, but a lot of times the in-depth reviews will give more of an insight into what people really think about it, and the star rating system is often skewed (Trolls intentionally upvoting garbage or intentionally downvoting solid works).
It is already the case that abusive reviews can be flagged, and I think this should be good enough. If it is truly abusive, it can (and should) be flagged, and if someone does it enough maybe they'll get a ban, but I do not think that reactions or reviews to content should be blockable by the user, period. It is reasonable not to alert the user to new reactions or reviews from people they have blocked but it isn't reasonable to block those reactions and reviews from the world, especially in the content areas of the site, such as the various portals.
Now, I'm okay with blocking on news posts and that sort of thing, but presumably blocked users aren't allowed to post on people's newsposts anyway.
As it is, people are really discouraged from leaving anything but asskissing reviews, unless they know the person well, in the offchance the content creator really didn't want honest reviews anyway and just wanted some sort of hug box. Likewise, while it has always been possible to flag abusive reviews, it also should be possible to flag abusive replies to reviews. It should go both ways.