Hey thanks for the feedback. I understand your point on the topic, but I would like to point out that CheckUp isn't trying to 'solve' suicide in this manner. The philosophy behind the project is that you, at some level, care about the people you are socially connected to, and you may care if they are contemplating something very bad.
The goal is to create a service that will prioritize self-threatening posts from people you care about above the usual noise of your social network. Publicly posted cries for help can indicate very serious intent and we just want to make sure they don't go unnoticed.