[JuniperMesos]

There's a substantial number of people who see drug decriminalization as a failed experiment. The most salient example is the state of Oregon re-imposing criminal penalties for drug possession in 2024 after having decriminalized them in 2020.

You can also look at discourse from people who are unhappy with de facto marijuana legalization for a variety of reasons, including that it causes more public places to smell obnoxiously like weed; or that legalization allows legitimate profit-seeking firms to market marijuana more effectively to more people, creating additional marginal lazy stoners and thereby making society generally worse off.