I used to, and I know ignoring opinions that differ from your own is just silly and allows for a goldish bowl effect. But frankly reading so much nonsense from people that clearly weren't just offering an alternative perspective but instead clearly trying to provoke and create tension is just no good for my mental health.
Might seem a bit grandiose but I have a stressful job and deal with enough difficult people through that, so when I step away from work to enjoy my hobbies I like to minimise the amount of bell-ends. Football should be about enjoyment, not arguing with members of your own fan base who just want an argument. Supporting Sunderland is stressful enough without generating additional stresses within our own community.
Not saying everyone should do that, and others may think its weird I'd want to limit it, but I'm much happier consuming it this way, even if it gets confusing reading people's posts when they're replying to one of the idiots
It's the same reason I have gone block / ignore heavy on twitter. And I've deleted all social media from my phone so that I only deal with it when at my computer.