Report abuse definitely happens, but the suspensions are still decided by a moderator upon review of the flagged post(s).
If report abuse is found to be the cause, then the people abusing the report feature get suspended, not the person who’s post(s) got flagged.
A lot of my posts get hidden immediately on the Arena forum for example, because some people there regard everything I write as trolling. You get a systems message in your notifications that the post(s) is pending for a moderator review, and if there’s nothing wrong, then it gets un-hidden again, and the people abusing the report button likely get banned as a consequence.
For example:
If you get suspended, it’s always because you’ve violated the Code of Conduct.
if your post(s) get flagged and hidden, it may just be because players abuse the report feature. A moderator always reviews the buried posts to check the validity of the reports.