From my one encounter with you, absent in company with a gang of other Scottish and NE gransnetters, I think I can dismiss any thought that you might be gay or 30 (maybe 31 on a good day?) I suppose it is still possible that you are a defrocked vicar, but I doubt it.
I think we trust people unless they prove untrustworthy, but I would add a question - trust them to do what or be what? They are unlikely to abscond with our money, or mug us in a dark alley, or trick us into carrying drugs or explosives. There is no need for us to tell anyone any secrets about ourselves that we would rather not reveal, so they won't be blackmailing us. Our real-life faces and identities are only known if we meet up in the real world, so if we ask advice they can't spread things about us to our family and neighbours.
Do we trust gransnetters not to tell outright lies? Yes, until and unless they get their lies in a muddle and contradict themselves, or tell such blatant rubbish that it is obviously concocted.