There have been some quirks that have accompanied craft beer’s remarkable growth in the past few years, but indifferent ignorance and blistering stupidity shouldn’t be among them.

Last week, The Intercept pointed out that a political action committee funded by Massachusetts beer distributors contributed $25,000 to the Campaign for a Safe and Healthy Massachusetts during this election cycle. It was also revealed that Massachusetts-based Boston Beer Co. SAM, +3.82% , which produces the Samuel Adams line of beers, noted in a Securities and Exchange Commission filing that the results of this year’s election could “adversely affect the demand” for its beer.

They weren’t contributing to a particular political candidate or attacking a portion of Donald Trump or Hillary Clinton’s platforms, mind you. They’re targeting a Massachusetts referendum that would legalize recreational marijuana, and they’ve done so in such a way that makes you wonder if the distributors and folks at Boston Beer are, themselves, high.

“ Despite the University of Colorado predicting that consumers would swap out weed for beer whenever possible, beer-tax revenue has actually increased each year since legalization. ”

First, Massachusetts beer distributors aren’t in any position to say what does and doesn’t adversely affect the beer industry in that state. After Massachusetts distributors were caught and documented for using pay-for-play tactics to sell bar and restaurant tap handles to the highest bidder, it could be argued that the distributors themselves are one of the greatest threats to both brewers and consumers. Second, we wonder if Boston Beer needs any help dissuading the public from buying Samuel Adams beers, considering sales for the year through June were down 6% from a year earlier, according to IRI Worldwide. That doesn’t look like an incredibly steep slide, until you realize that the Brewers Association craft beer industry group measured 8% for all craft beer brewers in the same span.

We can’t blame Sam and his legitimate business partners in distribution for being afraid, though. Arizona, California, Maine and Nevada also have ballot questions that would legalize recreational marijuana. However, it isn’t as if there’s another example out there of a state where brewers have had to contend with legalized marijuana right in their backyards.

Oh, wait ... there are a bunch of them.

While Massachusetts does pretty well for itself on the beer front with 84 breweries up and running by the end of 2015, that isn’t even a third of the 305 breweries that Washington state had operating within its borders last year. Marijuana has been legalized for recreational use in Washington since 2014, and created only $1.8 million in tax revenue in the first year as dispensaries struggled to get up and running. That same year, state beer sales brought in $29.91 million in tax revenue.

By 2015, when Washington cannabis sales were in full swing, tax revenue from legal marijuana jumped to $64.6 million. How did that affect beer? Well, beer-tax revenue actually increased to $30.8 million without an increase in the tax rate.

It’s a similar story in Oregon, where legalized marijuana first went on sale in July 2015. According to the Oregon Liquor Control Commission, Oregon brewers sold 54,272 barrels of beer in June 2015, just a month before recreational marijuana went legal statewide. By June of this year, the number of barrels sold increased to 62,800 — in a state with nearly 140 more breweries than Massachusetts.

What about Colorado, where marijuana was legalized at the beginning of 2014? Well, despite the University of Colorado predicting that consumers would swap out weed for beer whenever possible, the amount of beer-tax revenue collected by Colorado has actually increased each year since legalization.

Finally, there’s Alaska. The biggest state in the union legalized marijuana in early 2015, but its alcohol consumption figures may explain why the Massachusetts distributors and Boston Beer are worried. As it turns out, the consumption of beer, malt beverages and cider has been decreasing there for a number of years. In 2012, Alaskans drank 10.7 million gallons of all of the above, yielding $11.6 million in tax revenue. By last year, consumption had fallen to 10.2 million gallons, which shrank the tax pool to $10.9 million.

However, Alaska categorizes beer from small brewers. In their case, consumption actually increased from 3.4 million gallons to 3.9 million. That increased taxes from small brewers’ sales from $1.2 million to $1.4 million during that span. While Alaska had only 27 breweries at the end of last year, that’s up from 20 five years ago, and gives the state 5.3 breweries for every 100,000 residents, ranking Alaska No. 8 in the country in breweries per capita.

Though there are groups in Arizona trying to block marijuana legalization there for the same specious reasons, and liquor powerhouse Brown-Forman BF.B, +0.40% (Jack Daniels) also considers legal marijuana a threat, there is absolutely no evidence that shows it’s bad news for brewers or distributors. In fact, it’s the plummeting sales of brands including Budweiser, Bud Light, Coors Light, Miller Lite, Busch and, yes, Samuel Adams Boston Lager that are dragging beer down faster than smaller breweries can push them up. That is the biggest reason why, according to numbers from the Beer Institute industry lobbying group in D.C., beer industry sales have fallen from a peak of 213.2 million barrels in 2008 to 206.3 million last year.

If brewers and distributors want to protect themselves from threats to the industry, they may want to consider spending less money on anti-marijuana lobbying groups and more on actually figuring out what consumers want and then give it to them.

Jason Notte is a freelance writer based in Portland, Ore. His writing has appeared in The New York Times, The Huffington Post and Esquire. Follow him on Twitter @Notteham.