Nice comment. I'm responding because you asked.
How. Click those three little dots next to the follow/unfollow on a user profile page, there it says block/mute. Click that.
Why. Because you promote your own content for days on end forcing the community to see it over and over like a broken record whether we want to or not. Each time I sign in I'm stuck looking at the same distracting content again, potentially shoving worthy content further from my view so I blocked you.