I just logged on after a while and noticed a PM asking me to remove an unrelated positive trust I left them. But I'm not going to do so, because they aren't scamming to the best of my knowledge.

Even without cloud mining, a lot of last-gen mining rigs that are still being sold would not break even. Does that mean that their sellers are scamming too?

Saying that they are scamming/committing fraud would imply that they are misrepresenting what they are providing the user. But to the best of my knowledge, they are giving users exactly what they sign on for.

Is investing with them a bad idea? Probably, but then so would be almost any other form of mining.
Mining, cloud or otherwise, has been a bad idea for all but the tiniest minority of people for quite a while.
Telling people to not mine is one thing, but telling them that they are being scammed by choosing something that has had a negative ROI for a long long time, is just shifting the blame away from the users who jump on the hype train.