I agree it's like religion in that proselytisers tend to get involved. And like religion there are only proselytisers on one side of the argument. There's a pretty long thread on this elsewhere in the forum and it's quite recent.
Smoking is a bit like religion? What, the Father, the Son and Lambert & Butler? God gave up his son so man could smoke thirty Capstan full strength a day? He died on the cross so we could have an occasional spliff? After the feeding of the five thousand did they all get a Woodbine each?