I absolutely HATE cigarette smoke. First of all I am allergic to it. So being around someone who is smoking is definitely out for me. Secondly, I live in a very old building, and if someone is smoking in their unit the smoke seeps up into mine through the cupboards. Many times I've opened the cupboards under my kitchen sink (or my linan closet in the bathroom) and been slapped with a thick scent of smoke. I've had management seal my cupboards, so it's not as bad as it used to be, but i still get it seeping in. I don't see the smoke in the air, but that whiff of it is enough to get my eyes watering, my sinuses clogged up and the hacking cough to begin. I also have neighbours who smoke in the hallway on wet or cold days, and some who light up just before going out the building. Many nights I am bombarded with cigarette smoke so badly that I can't breathe freely lying down, so I have to prop myself up to sleep. Did I mention that I HATE cigarette smoke?