I think Lemmy 0.19 has this feature, though if you're having problems with spam users from those instances you'll need to report them or have your administrator deal with them, as the domain blocking feature does not hide users.
Also even if it did the act of hiding users isn't great since people commiting violations need to be dealt with or otherwise impeded from doing so, and blocking doesn't stop them whatsoever. At least on Reddit it locked them out from replies but here it's the same as ignoring them. I know people didn't like that but the majority of people who I've seen complain about being blocked on Reddit (especially by me) were:
Transphobes, truscum included (I blocked a lot of them when the blocking changed to Two way)
Trolls (especially the alt-right variety, but a decent amount of commies, tankies, and your average "enlightened centrists")
Yeah, I can do that easily on my app as well. I was just wanting to know how to block whole instances like hexbear. I don’t want to see anything on any of their communities. And you can do it in the web ui, although it isn’t all that intuitive.
People who call themselves leftists and anti imperialists. But in reality they shill for any dictator who opposes the US Hegemony. They do not give a shit about the people who suffer under the regimes they love. They inexplicably love dictators from Stalin to Putin, from Mao to Assad.
The term originates from when the Soviet Union overthrew the people’s councils in Hungary with tanks early in the Cold War. Some people in the west supported this act because the Soviet Union did it, therefore it was good.