It already is, /r/all used to be current and now it's just a constant stream of spam posts.
You should be able to block a webpage and all users that share it. Relay For Reddit has a feature where you can select "other conversations" and see all the posts of a specific link. If I could then block everyone who posted a shitty "Elon runs an ETH competition" post... There'd still be a millions others.
Nazis everywhere, Spez left #the_donald alone to grow in scope. Fuck Spez