Good useful info or not - why always come out guns blazing, shooting everyone and all down? Even people who quickly realised that a fight with him couldn't be won - not because he was right necessarily, but because he never backed off. Even when they tried to agree and make friends just to stop the bloodied jaws from chasing them, he would never accept it. That's just mean. How about being a human being and a mensch and accepting a reached out hand?
For me, it's a bit like dating a woman and then finding out she's rude to waiters. After that I can't continue, no matter how good looking or fun she is, as it's so far removed from who I am and how I want people around me to be.
You are ultimately judged by how you treat others.
But this is much bigger than Guppy - half of the posters here on PPrune I wouldn't want anywhere near me in real life if they behaved like they do here. That's true for most anonymous forums. I'm a member in other forums where you have to reveal your identity, and they're much calmer and better behaved. Granted, you'd never hear the same gossip or rumour on one of those, so there's a case to be made for both types.
All I know is my name is real I won't hide behind anonymity and I aspire to treat people like I'd like to be treated here. I certainly don't have Guppy's experience, if it was true, but I can go into any restaurant in this world and get clean food
I bet he can't.