Normal people know enough not to inhale smoke.
That is of course normal people younger than 55 or so when the truth came out about tobacco.
People older than that didn't have the truth, so cannot be called abnormal. Their addiction isn't their fault.
For those young enough know the truth, and still chose to take up the filthy and hazardous addiction, how can they possibly be normal?
Would deliberately holding a gun to you head and playing Russian Roulette be considered "normal"?
Same thing.
Thanks for the lecture (unsolicited) I asked what makes you so normal----YOU. I know what my faults and failing are. I don't want you or your likes running my life. BELIEVE ME you would not want me running your!!! Sure I'd find something terribly "filthy" about you. EEWWWW!
No, tobacco has been known to be harmful and addictive for well over 100 years. Despite the tobacco companies propaganda, the data was out there and easily obtainable by any adult. I cut no slack to the people who claim they didn't know better.
If people still want to smoke, even knowing the downside, then I give them the same consideration I would an adrenaline junkie who freeclimbs cliffs. If you sustain grievous injury, it's your own damn fault. Just try not to splatter on me when you fall.