I am shocked not to see any "those damn liberals" posts yet, but perhaps more shocked that conservatives Stewart and Farr voted in favor. 

In general, I am in favor of letting adults make their own decisions about drugs and most other conduct. However, there is plenty of evidence to suggest that from a developmental standpoint, many 18-year-olds are not yet mature enough to make responsible decisions. This ordinance is largely a token measure but does at least give young adults a reason to reconsider whether to use tobacco.

Young people have the rest of their lives after age 21 to freely smoke and drink, and of course the rest of their lives will typically be shorter if they decide to go that route.