A center-right think tank is raising alarm about a Colorado bill that it says would make it illegal to talk positively about marijuana online. The prohibition would also apply to many hemp products as well as some federally legal pharmaceuticals.

Among other provisions, SB24-158—a broad proposal around internet age verification and content policies—would require social media platforms to immediately remove any user “who promotes, sells, or advertises an illicit substance.”

The bill’s definition of illicit substance includes not only illegal drugs but also many that are legal and regulated in Colorado. It pertains to any controlled substance under state law, including schedules I through V under state law.  That means the bill would affect state-legal marijuana, certain psychedelics—which voters legalized through a 2022 ballot measure—and even some over-the-counter cough syrups that contain small amounts of codeine.

Beyond scheduled drugs, the bill specifies that its restrictions also apply to certain hemp products with more than 1.25 milligrams THC or a CBD-to-THC ratio of less than 20 to 1 and most other hemp-containing products intended for human consumption.

If enacted onto law, companies would also need to publish “a statement that the use of the social media platform for the promotion, sale, or advertisement of any illicit substance…is prohibited.”

The R Street Institute says the restriction would impact not only cannabis companies but also any individual who posts positively about marijuana.

“Basically, the Colorado Legislature is trying to force social media companies to ban the promotion of marijuana,” the group’s social media director, Shoshanna Weissman, wrote in a new article. “And because what constitutes ‘promotion’ remains undefined, the bill would likely force platforms to remove all pro-marijuana free speech in a state where recreational use is legal.”

Not only is the ambiguity of “promotion” an issue, but the bill’s broad definition of illicit substances could also cause confusion, R Street says.

The think tank points out that the bill’s definition of illicit substances “would make it unlawful for businesses to promote them for sale or even for regular people to talk about their benefits online.”

“This clearly violates the First Amendment, as the bill is unconstitutionally narrow in scope,” Weissman wrote. “Basically, if speaking highly of or advertising these substances were truly dangerous, the state would have banned advertising in all its forms (e.g., print, television, digital).”

This Colorado bill would force social media companies to ban the promotion of marijuana, anti-anxiety meds and even cough syrup. It would likely force platforms to remove all speech in favor of these. https://t.co/vZtMNSy6Aj @senatorshoshana

— R Street Institute (@RSI) March 16, 2024

Instead, as the R Street article notes, the state itself seems to have embraced legalization and cannabis culture. For multiple years, it points out, Colorado has auctioned off marijuana-themed license plates that read things like “420,” “HASH,” and “GOTWAX.”