If I meet someone I don't trust (which is 99.9% of people I know in-person) and avoidance isn't possible, I'll give a nod or engage in the smallest of talk with the least amount of personality possible. If I meet someone I trust, I'll babble on about everything and anything that crosses my mind in that exact moment, the same way as I do on here. The only people I really trust is my family (with a self-filter for cacaotry of course), and two normgroid acquaintances (with an even bigger self-filter for cacaotry of course) I muck around with exclusively at School lunch.