I never reply to suggestions, and probably won't subscribe due to the mixed opinions, and frankly don't like to draw too much attention to myself but...
I think a block feature is not only needed, it's also long overdue.
I personally don't see the issue of the whole 'interaction' point. There's roughly 790 users online right now. Say I block 5, I will still be able to interact with all these 785 users, which I probably won't even reach.
Especially in current events I think a block feature is needed.
It is up to the user to be responsible by reporting if necessary. But I wouldn't mind not seeing some users pop up, to be completely honest ^^'
Also as Minni said above, unblock would be nice! Personally already didn't like having to contact a mod about my review to he changed and really hope we don't have to contact them about a blocked user. That's kind of... personal :)
art by Shadowfeathers of Thunderjaws OC Steve, edited by MossDragon for Thunderjaw's use only