Years ago, I worked for a "brand name" consulting firm, there was this new guy assigned to our project who was a hotshot, arrogant MBA. He was bragging up and down how great he was, when in reality he just graduated from college and didn't know squat about business in the real world. He was "low man" on the project totem pole, but acted like he was running the show. His "halitosis of the personality" made him completely unlikeable.
One day, after lunch, I went into the client's mens room to take a leak, and I recognized Newguy's shoes in the stall next to the urinal (I forgot to mention he was quite the snappy dresser and flaunted that, too). I went back to the project room and a couple minutes later, he got back to the project room too. I shut the door, and said, "sit down, we need to talk." I went on to say that obviously nobody had told him the rule yet, that we are not allowed to go #2 on client premises. (Keep in mind, the guy is brand new to the firm.) The rest of the team joined in, commenting that pooping at the client is not our firm's professional image, that the client is paying high hourly billing rates for our time and how would they feel knowing we were spending it pooping, yada yada yada. Our team, collectively and spontaneosly, came up with about ten good, credible reasons why we are NOT to take dumps at client sites, and that to do so would be a real CLM ("career limiting move"). Newguy apologized, noted how all those reasons made good sense, and committed to never do it again on this project or any other in the future. Seeing how we stayed on site over lunch and were working 12 to 14 hour days, the guy quit "cold turkey" and had to totally change his bodily schedule to accomodate our "rule".
To my knowledge nobody ever set him straight during the two or three years he lasted with the firm.
Dave