Desperate attention-seeking behavior
...by the Sams. Their heart is undoubtedly in the right place, but this is really a bad plan. I smell whalesong and joss-sticks.
I've lost someone to suicide, and asked myself (still do) whether more could have been done, more attention could have been paid. But for that to have even been possible in the context of this app, I'd have had to have suspected severe depression in the subject to begin with, which nobody did (sadly often the way).
If you suspect someone is going down that path, just fucking talk to them. As much as you can. Do your best to convince them you're not doing so out of social obligation. And get ready for them not believing you and doing it anyway. But as I said, this is largely academic, because, statistically, you won't even suspect it.
Cheery, eh?