OK...it may seem extreme, but, yes, the Mint can develop and implement policy that would prevent "conflict of interest" activities by its employees. That wouldn't specifically prohibit coin collecting, but could, potentially, prevent dealing in certain types of coins, especially "error" coins and unauthorized minted coins. It should be agains the rules for mint employees to strike coins that they subsequently pilfer and sell for a profit.
I don't think so. Conflict of interest would be if an emplyee would make and distribute coins, not collect coins. The buying and selling of person property can not be controlled by any employer if done on own time and with own merchandise. Conflict of interest would not apply.
And Conder101. If you eat that much pizza you should have your cholesterol checked. Your blood could possibly make for a medical journal. Not sure if everywhere but when my Cholesterol count hit 362, the insurance company at work theatened to drop individuals unless they did something about high ratings like that. My boss and myself were the highest in about 8,000 people they said.
Yes, you are the exception I would think. One neighbor of mine used to work at Mcdonalds and now can not eat Hamburgers.