I know Liss. I don't think I've ever been hurt badly, though I have shared stuff on threads I thought were real because, well, like you do, you want to do your best to be helpful. And it seemed a shame the threads got deleted so the advice was lost as a communal resource.
That's all really.
I don't tend to do much IRL for folk though if there's a desperate thread like you sometimes get - people who pile in and start giving the person loads of money etc, well I keep out of all that. If I offer help in terms of advice etc it's because I want to, and it makes me feel useful, and I don't really care too much if the person wasn't real, then, because I've lost nothing much.
Even sharing painful experiences helps other genuine people who read it.
I'd say don't get involved with anyone off board unless you are 100% sure they're real and you aren't giving anything you will regret losing if they're not.
I actually left around New year because people thought I was, well I don't know what, something that got on their nerves. I never found out exactly what they thought because they only told each other, not me. It was very very painful after being here for 5 years.
I didn't come back till about a week ago because I felt horribly unwelcome. You see hardly anyone stood up for me. It made me think everyone thought the same. I'm here now again but I'm not sure why, I suppose what I got out of it before, but without sharing a lot this time.
I wouldn't wish that feeling on anyone tbh