The smell of cigarette smoke makes me ill as well.....disgusting smell.
BUT, I must admit that I'm with Skysue on this one. I've had smokers as clients in the past too. I didn't like it, I tried not to breath through my nose during pick ups but we can't very well tell someone not to come in our homes to pick up the children they've paid us to take care of because they smell bad. What if the smell was from body odor, or from a workplace. My dad was a farmer and would reek the place up when stopping in to grab something. We didn't like it, but that's life.