Well I am not going to post anonymously.
While I don't believe that marijuana is without it's risks, if police are telling children that meth and weed are the same then they are doing a disservice to the children. There is absolutely no comparison between the impact of the two drugs on peoples lives. Meth is highly addictive, and will make your body slowly melt into death. I should know, I watched it happen to my uncle. I on the other hand have stayed away from all drugs (including alcohol) for years, but have enjoyed and used marijuana on a regular basis. I am in great health, have a happy, fulfilled life, and am in loving relationship. Weed didn't wreck my life, in fact it has helped in many ways.
So when part of what you tell a child is a lie, they won't believe the parts you told them that were true. When people lump marijuana in with harder drugs like heroin and meth and kids then don't have a bad experience with weed, they will believe that what you told them about everything else was also a lie.