Option of a spam card?

Hi,

The feature that I would love to see would be the option to have two mondo cards, one for normal usage, and one for use in places where things look a bit iffy, such as a website I’m unsure about, a vending machine that accepts cards, a dodgy cashpoint, etc. The spam card could have a limit imposed upon it as to how much could be withdrawn, could block individual transactions (for future reference), and be cancelled at any time. Transactions on the spam card would also be subject to more fraud checks, and could conceivably allow mondo to build a profile of individuals processing payments. I would be happy to pay the cost of buying/replacing spam cards, as I know they aren’t the cheapest things to be giving away in bulk. Anyone else feel like this would be useful?