https://www.techdirt.com/articles/20191226/17293743640/washington-court-says-local-pot-dealers-can-hang-up-christmas-lights-that-spell-pot.shtml

Buying and selling marijuana is legal in the state of Washington. There are several limits placed on these acts, but it's pretty much the equivalent of alcohol. You have to be 21, can only buy a certain amount at a time, and can't smoke it in public or drive under the influence.

What's apparently illegal is playfully announcing your pot business sells pot using nothing but Christmas lights. (via Reason)