[zunzun]

This might actually be difficult to discern, as the site has "shadow banning" where an unpopular posting or comment can be banned - but not from the original poster, so they do not know it happened. I personally consider this a deceitful practice, as the person posting is being deceived into thinking other site users can see what they write but this is not true. So if someone has an unpopular opinion they might not know of its unpopularity due to this practice.

[krapp]

On the one hand, shadowbanning is reversible through public action now, so it's not as bad as it was. On the other hand, you can lose your ability to do so if you vouch for too many comments the mods consider divisive or low quality.

[gus_massa]

IIUC most ban had an explicit announcement of the mods, but I'm not sure if after the ban the poster can see that their post are [dead]. (I think that there are some automatic bans for new accounts with too many automatic red flags.)