Have you ever ran into someone on PIMD who lies about everything they tell you? "I'm totally an austronaut, dude." Yes they do, it's the internet. Side note, since PIMD is turning into a dating website... ... Hopefully this is enough for you thirsties.
When people lie online it's because their real life is just so boring or crappy they need to make an imaginary tale to feel better about themselves.
It's much more interesting hearing about a wild tale though than someone saying 'I don't give out personal info'.