Frankly? I'm with you. Whenever you have to interact with someone, you have to ask all of these questions to yourself. Are you talking enough, are you talking too much, are you standing too close, are you making eye contact, or if you are making eye contact, are you making too much and looking like a total creep? What do you do if they offer you drugs suddenly? What are you supposed to do with your hands? It'd be easier just to avoid people entirely.