Why is cannabis illegal? Bees like it? Are bees going to jail?

http://www.shawnjason.com/bees-make-honey-from-cannabis/

The magic of nature's design. Symbiotic dance of humans, animals and plants. I'm still dumbfounded. And to think that we threatened our children's livelihood if we ever found out they were even close to anything related to this plant. God, please forgive us. Now, they laugh at us and say "We told you so".