Who is the "Reddit Suicide Alert?"
https://www.theverge.com/2020/3/4/21164687/reddit-new-suicid...
On some subreddits every other post will be reported like this.
Meanwhile, Reddit tends to do very little about reports of even direct violence threats ala "I will find you and I will kill your children" etc. which are frequently found to "not be in violation of the terms of service".
Anyways people use it all the time in every single sub for any unrelated thing, just because they hate you, downvoting is not enough, trolling etc. In sport subs it's very common to report opposing fans with this option for example