I agree with you completely. I'm not saying these things never happen, but I have NEVER seen anyone reject a credit card to embarrass someone, complain about getting tea (and we didn't even boil the water in either restaurant I worked at), given decaf in lieu of regular (didn't find cleaning a pot excessively hard work), added sugar to anything, let alone a kid's meal, pushed food so it didn't expire (though I have had heard Ramsey talking to the chefs about staying on top of waste BEFORE foods spoil), or lied about the contents of anything on the menu by refusing to give the calorie count, If I didn't know, I'd check and it certainly wasn't against policy to hand this information out. I would also NEVER tell a vegetarian something was vegetarian if it wasn't. I also would never pass whole or 2% (only milk we carried) off as skim.
To make the OP feel worse however, I didn't wash the lemon and no one I knew did. We would wash our hands before cutting them up and the only part touched was the rind. Knowing the procedure, I'd toss 3 or 4 in my water or tea (or on my chicken or seafood) in a heartbeat without batting an eye.
IMO, the link was written by someone who doesn't really know Jack.