P2P is just getting scary these days. The little fast trade we do for small money is what they are turning into something else. If the money is very small, some traders might not really care, but this is not just about the person; they also do this to others. Before the end of a day, they can easily scam someone or even more than one person.
The moment I see a complaint from any buyer, I give you a straight warning, and once you pay me below what you are supposed to pay, I don't even waste time; I report the trade ASAP so that they will know that I don't have patience, and even when the balance is sent complete, I still will delay the release of the coin so that next time, if they keep a record of seeing my order, they will behave well.