I don't think 'I've been there and felt this way' type posts will hinder the OP in anyway, but I do worry about people that post this type if response if they aren't going to be able to cope with the worst.
I always post my experiences on these threads and say I got help, sorted myself out, but tbh, if it happened, I'd think, damn, I can't believe she killed herself, what a shame, poor dcs etc, and then move on.
I worry others may take that guilt upon themselves and it could crate a vicious circle of people feeling suicidal making themselves feel worse by trying to 'help' when in reality, one message on computer screen isn't going to stop anyone.
I also think though we need to reply, total non-response bar 'call someone' could be enough to make someone already suicidal looking for that hand to grasp to stop them going over the cliff could think 'fine, fuck you, you've proved it's not worth me staying' and do the deed, whereas IMO if they are posting, they are still unsure.
(Sorry, rambling)