Tighter regulation

Is there a bit of a pushback against the way legalisation of marijuana is happening in the US? 

An opinion piece in the NYT argues it should not be sold to those under 25 on health grounds - a suggestion likely to not go over well in colleges across the nation.

The Washington Post reports that the high potency of marijuana products sold in Colorado is causing problems, as well as where it can be sold:

The critics also insist that more must be done to maintain tight regulation of the industry. That’s not been the case so far, they argue, with dispensaries opening near high schools in Seattle and with retail and medical pot shops in Denver outnumbering Starbucks and McDonald’s locations combined. 

Americans are rather naive, it seems to me, when it comes to the matter of  how regulation affects society.