I don't think stuff like that has any effect. People who don't smoke are the only ones who pay attention. Smokers are going to smoke. Period. To me, it is much like when you are in a theater and they tell you to turn off your cell phones. There are two types of people; those who turn off their cell phones, and those who do not, and the notice does not make a difference.
Mine went off during a graduation a couple weeks ago! I hardly ever bring it with me to places, and I hardly ever get calls anyway. But, during graduation I just had to get a wrong number!
That happened to me when I was at the cemetery with my boyfriend and his family for the internment service for his father's cremains. In the middle of the service, my cell phone started ringing. I was so embarrassed and later apologized. Afterward, the girlfriend of someone there said "WOW, HOW EMBARRASSING!!!" Thanks, needed to be reminded that everyone heard it.....
Like you, AKron, I rarely get calls, so perfect timing. It had to be a sales call - out of state area code and they didn't leave a message.