As a young man, I once went into a fast food restaurant, tired of them screwing up my to go orders and making my children cry, I chewed out the manager and crew loudly. Demanded that they read the order and fill it correctly. The manager apologized profusely and then asked me what I was eating out of that large order. I thought she was going to make sure it was great.

Evidently they had some meat that had gone bad in the back and she made me an e coli burrito. Almost killed me and taught me a valuable lesson. I have never insulted or raised my voice to anyone who handled my food or drinks, no matter how incompetent.