Are these fears born out of experience or are you just voicing concerns for what you think is going to happen? To be honest, what you've written reads like you

Are these fears born out of experience or are you just voicing concerns for what you think is going to happen? To be honest, what you've written reads like you are the victim of a lot of scare-mongering and hysterical claims about the effects of legalization. For one thing, I see no evidence of "the US totally overdoing this", least of all because there is no US wide approach to cannabis legalization, even among the states where it is legal. Most of the states where cannabis is legal seem to be handling the matter with great caution, with the laws and regulations in place specifically precluding the commercialization fears and behaviors that you are citing. Just google "Alaska cannabis laws" or "Oregon cannabis laws". Some cities forbid the sale of recreational cannabis altogether, limiting users to what they can grow themselves. You shouldn't judge decriminalization in the US based on sensationalist reporting from the worst excesses of it; you have to remember that the US isn't one place and one set of laws when it comes to cannabis legalization.