Heads up, Lemmy’s block system is more like muting. I wouldn’t really recommend it’s use non-discriminately. This is because blocking simply hides users it doesn’t prevent interaction on posts or comments, it doesn’t deal with them if they are actually problematic users.

So if you see people being trolls, harassing others, or making bad faith arguments I highly recommend reporting them, as it can be helpful to alert admins and moderators of bad people and take care of them.