Originally Posted by
Peatisback
It's pretty convenient- sometimes I'll just touch my wallet to the machine and it woorks (just to see if works. I'm not that lazy). I've found, though, that maximum amount you can charge without signing really varies (anywhere from $5 to $50).
That's because
all of your information is being broadcast in the clear, and anyone with $100-worth of equipment could 'ping' the card from a distance and intercept it. And yes, it broadcasts this information even when your card is in your wallet or purse.