Im kind of confused by your post. I hope you know that they do tell you why you were ban. usually for toxic behavior. but if its for any other case contacting support will tell you exactly. Aside from that, majority of the time people know what they did wrong. Its just like people who apparently need to be warned not to break the rules. its useless because more often than not theyll just continue to break the rules.
Also just because you are reported doesnt mean anything. People can report you for basically anything. If you did nothing wrong, nothing will happen to you. So dont worry about people reporting you!