That is 1 reason - another reason is because competitor XYZ might have hired them a few years ago and they can get some inside info. They might say they don't s

That is 1 reason - another reason is because competitor XYZ might have hired them a few years ago and they can get some inside info. They might say they don't share anything, but if Person A worked for a past company and he now is consulting for you - don't you think he'll spill some secrets...