Is it possible to share information from Akka PSN

Hello!
Never interested in a particularly topic buy akkov for a few people, etc. All games buy in the figure, on sale and only on PSN. Recently tearfully knocking me in PM some American who is asking for my username and password from PSN for Driveclub rent Bikes, because soon will close the server. He wants renting a game for 2 weeks, as he explains, quick to log in to my account to activate and get ready to pay up front. To throw people I don't like, so I want to know how safe it is, is it possible to get ban and if he could steal my account.
Thanks in advance.