Update on Bathroom Etiquette

I have just experienced something new in the bathroom that I want to add to my post about office bathroom etiquette:

I was in the stall attending to some business when a guy came in to the use the sink. At first, I thought he was washing his hands (acceptable, although you really shouldn't even do this if someone is using the stall) but the sink was on for an extended period of time. I thought it might be the dreaded toothbrusher but I did not hear any brushing of teeth. I finished up what I was doing and exited the stall to see and old guy washing his dishes and coffee mug. So here is a new rule/guideline for the office bathroom:

Don't wash dishes in the bathroom. There is a kitchen right around the corner that has a sink and dish soap. Wash dishes there, at home or use environmentally unfriendly paper/plastic products that can be disposed of.