Anything you do, that will disturb poeple, will get you banned.
Poeple just autoreport for anything they dont like, mistakes, hero swaps, bad language - can be anything…
And blizzard cannot employ millions of poeple just to read reports and watch replays.
If you reach X-number of reports, the system suspends you automatically.
If you write complaint, a bot will reply “we have checked evidence”.
If you get lucky, a human will respond “25x games ago, you once said “youre bad pls swap” to a player with negative k/d ratio. Therefore all other reports are justified. Enjoy ur ban”