It's easy to get blocked on ActivityPub based networks like Mastodon or Pixelfed: if the instance admin doesn't like something you say, they can kick you out. A

It's easy to get blocked on ActivityPub based networks like Mastodon or Pixelfed: if the instance admin doesn't like something you say, they can kick you out. Also if you run your own instance, it's quite possible that admins of other instances will block your instance, so their users (unknowingly) won't see your posts. Another thing that literally happened to me was that the mastodon instance that I was on shut down and I found out after it happened and so I was not able to export any of my stuff.