You wouldn't be aware of any comments or posts removed unless automod or a moderator specifically notifies you. They still appear to you as normal, but show as

You wouldn't be aware of any comments or posts removed unless automod or a moderator specifically notifies you. They still appear to you as normal, but show as 'removed' to anyone else. I disagreed with a mod in a city subreddit about the best cinema, and was banned for doing so. Didn't insult them, just a difference of opinion. Just for example. This is a pretty common thing which is why there are entire subs dedicated to documenting the behavior.