For small transactions you often don't have to sign anything or enter a PIN. I think the rational is that it would be fairly hard for someone to drain all your funds with < $20 transactions. Hopefully I'd realize fairly soon that my card was stolen/missing, and would call to cancel it.
Also, Visa tracks your purchasing habits to an insane degree. More than once I've gotten a phone call asking if I actually bought some item. Finally, I likely wouldn't be liable for much if any of the goods purchased with a stolen card. So, all in all, I'm not terribly worried about that end of the security.
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For small transactions you often don't have to sign anything or enter a PIN. I think the rational is that it would be fairly hard for someone to drain all your funds with < $20 transactions. Hopefully I'd realize fairly soon that my card was stolen/missing, and would call to cancel it.
Also, Visa tracks your purchasing habits to an insane degree. More than once I've gotten a phone call asking if I actually bought some item. Finally, I likely wouldn't be liable for much if any of the goods purchased with a stolen card. So, all in all, I'm not terribly worried about that end of the security.