These new rules are a pretty arbitrary line to try to draw, especially banning rape when it's one of the most common kinks and there have been plenty of prompts and fills with some degree of dub/non-con.

The banned prompt isn't asking to fetishize suicide or portray it in a positive light, it's just H/C centered on an interrupted suicide attempt. Treating suicide as a taboo topic is harmful in itself, it perpetuates stigma.