Lots of wisdom in this post, even the things said in jest have truth to them. If I had to guess, I would say that consuming excessive amounts of sugar on a regular basis is more harmful to your health that pipe/cigar smoking.
The older I get, the more I realize how much other people (including some doctors) like to shit on your parade. They don't know you from a can of paint, and yet they'll provide their unsolicited opinion as if they're doing you a favor. As it has been said previously, I will live my life my way; as I see fit. Most of the time, people's (unhelpful, malicious, prideful) opinions are something to be heard, considered and then immediately discarded as you go about your day.
They say "I'll quit when I'm dead." but let's be honest...most of us wouldn't. Don't let others bring you down. Light up a bowl and live your life as best as you can.