You have to think from other people's perspective though. Many people couldn't live with themselves if they knew they could make a difference and save someone's life, whatever the circumstances of the person they try to save. It is something that was ingrained in us since we're born, and many do still hold the same values as they grew up with. This is something a suicidal person should have in mind when deciding to ctb. Of course from our perspective, having the police called on us and being stopped from eternal peace is terrible, but from a normal person's perspective who knows you're about to do something of that magnitude, to them it's horrifying and they must act. If the group was public, and depending on the country's laws, they could even have an obligation to help. (For example, in France you cannot decide to not help someone who's life is in danger, you are legally liable if something happens to them.) Consider this when you decide to ctb, normal folks are not against you, they're for themselves and that means YOU have to protect yourself from their attempt to help. Because they WILL help, 99% of the time.
I understand the need to vent though, I absolutely loathe the idea of being sectionned.