I do this every time I do the dishes and my bride comes over to talk. She doesn't even get mad. She just sighs and walks away. I tell her not to bring a cup over unless she wants it washed, or to not put it down.
You too? That makes me feel a whole lot better!! Uwe and I actually broke down laughing as soon as I did it because Uwe said the expression on my face was priceless. :)