Among the list of banned advertising on Facebook you’ll find the usual suspects: guns, drugs, porn etc. Also, on that list? Bad grammar, and notably, cryptocurrencies. When it comes to political campaign ads however, the rules are few and far between. Unlike television, radio and print ads, online campaign ads don’t face federal regulations. Marketplace Tech host Molly Wood spoke with Phil Weiser, a professor of law and telecommunications at the University of Colorado, about the state of online political advertising.