(Forbes) - The U.S. wine market is still tightly regulated by the so-called Tied House rules, which have been in place since the repeal of Prohibition in 1933. They were designed to not allow any one tier of the business to have “undue” control of wine sales. However, their final legacy seems to be curtailing the social media market in some odd ways.

John Trinidad, senior consul in the Napa-based office of law firm Dickenson, Peatman & Fogarty, recently spoke at a seminar at the Sonoma County Bar Association conference, detailing what might seem to be silly foibles that wineries shouldn’t make lest they cross the legal line. Some of them were not particularly obvious, so winery owners and their marketing teams should look, and research, before they leap with new marketing initiatives.