Or if there were a way to leave the site and come back again - say a similar service starts up with any compatible inverse pair of inputs and outputs. I have t

Or if there were a way to leave the site and come back again - say a similar service starts up with any compatible inverse pair of inputs and outputs. I have to admit, I look at stuff like this and my first reaction is "hmm, what could possibly go wrong... could we somehow use this to calculate prime numbers perhaps?"