[crocodiletears]

I consider those kinds of bans petty, but hardly a platform issue.

Reddit exposes group affiliation by default through public post histories. One can lurk in any public subreddit without consequence. Even banned, you can still consume public subs, though you can't interact with them.

The simple act of account creation (choosing the wrong node) is enough to exclude you from otherwise public content in the fediverse.

Joining Mastodon is often described as joining 'mastodon the network', when in reality there is no cohesive network (though there may be a canonical network). You're joining your instance + an opaque number of unknown nodes, with much of the content arbitrarily disappeared for any number of historical reasons to-which you may not be privy.