No, you're not the only one.
I have read comments here and on other sites from folks who don't enter & also people who do.
If you were a Plumber, would you enter a sweepstakes for Firemen only?
It's pretty straight forward, you either use tobacco or you don't. There is no excuse and all of the fuzzy logic employed in an attempt to justify entry doesn't excuse the fact that you need to lie and cheat in order to enter. Actually you need to lie several times. First by claiming that you are a tobacco user, then by answering several smoking related questions.
This of course calls into question your integrity, morals, honor, virtue and ethics.
One wonders, why people question when their children grow up to be liars and cheats. Frequently, the answer is that’s what they've been taught - the apple doesn't fall far from the tree and if you do something, your children are likely to do it as well.