One day I was in an airport and wanted to use the wifi. Unfortunately I burned through my free 30 min way too quickly and had to pay a dozen dollars to the boingo hotspot crap.

I was on my phone so no way to change my MAC address unfortunately.

So I use paypal. I accept to pay the amount. And that was it.

Now a week later I connect to the free wifi in the same airport. And the thing decides to charge my paypal for one hour of browsing. I never opted to open my paypal account for boingo crap to have unlimited withdrawals.

So I contacted paypal and told them there was a fraud. I had never allowed these transactions. Paypal refused to do anything.