I had wondered. I bought a couple of rulers from a reputable on line quilt site and used my paypal. Got a call from the fraud dept. of my bank. Since it was an "unknown" caller I refused to talk to her about my account. Immedialtly called my bank and visited with the girls. They found about $1500 worth of purchases pending on my debit. This is one time I am glad I didn't have any money to speak of in there, all purchases were refused. Thanks for the heads up, that is something my kids tell me I should know but I never think to log out of each site I visit. Live and learn, it's a different world we live in.