I think it's when you take someone else's login information and dl their shit they bought through the store logged into their account on your console. So a stranger asked me for my email and password and if I had any credit card shit set up (I don't) they'd be able to go into the store themselves and buy things with my money. Idk why people think you'll just agree to that.
Oh, that's happened to me before...Someone saw how I had quite a DL fighters on the ps3, so they tried to convince me to cough up the email info, in exchange for madden...
I not only dislike football, but I'd didn't trust him, so I rejected the idea. He still every once in a while will try to get me to reconsider, but it still hasn't changed. /:-/