Rictor: actually it's not "quite horrendous" - any exposure to second hand smoke against your will is a violation of your rights and your body - smokers deserve to be treated like lepers, and the lepers didn't deserve it! So we should be saying the lepers were beeing treated as the smokers should be.
They are consciouslly making the decision to poison their body, and then additionally do not care that they are violation other peoples rights - and when informed try to make the other person be "EVIL", "FASCIST", etc -- they are basically saying they have the right to poison you and you can do nothing about it
01010: I can _smell_ a smoker well over 100 yards away in open air - and tobacco (or marijuana) smoke is harmful at any concentration and the concerntration required for it to be perceivable is fairly high even for someone with a sensative nose like my own