This August 2011 photo provided by the family shows Sarena Haskins, center, with her children, Hannah, 12, at left, and Hayden, now 8, in Olympia, Wash. Sarena Haskins is a regular user of marijuana for medical reasons, as allowed by state law. But she is opposed to a measure on Washingtons Nov. 6 ballot that would legalize pot for recreational purposes, and advises Hannah not to experiment with it. (AP Photo/Kris Haskins)
In this June 12, 2012 photo, Trish Nixon, left, stands with her 21-year-old daughter, Krista Nixon, in Colorado Springs, Colo. Trish Nixon talks about the challenge she has faced over the years about marijuana. Nixon said the message to her daughter changed over the years, evolving from "It's against the law, don't do it," to a more nuanced message that takes into consideration medical marijuana and ballot initiatives to legalize the drug. Trish Nixon said her mother's message meshed with what she was learning through her friends, which included some who used marijuana. (AP Photo/P. Solomon Banda)
In this June 12, 2012 photo, Trish Nixon, left, stands with her 21-year-old daughter, Krista Nixon, in Colorado Springs, Colo. Trish Nixon talks about the challenge she has faced over the years about marijuana. Nixon said the message to her daughter changed over the years, evolving from "It's against the law, don't do it," to a more nuanced message that takes into consideration medical marijuana and ballot initiatives to legalize the drug. Trish Nixon said her mother's message meshed with what she was learning through her friends, which included some who used marijuana. (AP Photo/P. Solomon Banda)
DENVER (AP) — Michael Jolton was a young father with a 5-year-old son when Colorado legalized medical marijuana in 2000. Now he’s got three boys, the oldest near adulthood, and finds himself repeatedly explaining green-leafed marijuana ads and “free joint” promotions endemic in his suburban …
