Yes, they did. In an effort to avoid reliance on personal anecdotes, I give you this British study from 1979.

www.researchgate.net/profile/Mark_Johnson36/publication/22633283_Teachers%27_smoking/links/0046351f914e84a47c000000.pdf [Warning: PDF]

It discusses the effect on students' smoking habits if their teachers smoke.

Just a heads up for people thinking of posting here: basing an answer around personal anecdotes is against our subreddit rules. If you take offence to this rule, please read this excellent post about the unreliability of anecdotal evidence on the internet. Thanks and have a good day.