(MercuryNews) - About the only thing Kevin Flynn enjoys more than drinking his home-brewed beer is sharing it with fellow beer club members at festivals and tasting competitions. So Flynn and his buddies were shocked to discover that Wisconsin law prohibits sharing homemade suds anywhere outside the brewer's home. The law could "pretty much be the end of competitions in Wisconsin," he lamented. "At least legal ones." An explosion of interest in home brewing is forcing lawmakers across the country to review long-forgotten alcohol laws, some of which date back to Prohibition. Although the old rules have rarely been enforced, beer enthusiasts fear they could criminalize the rapidly growing hobby and kill scores of annual tasting events that bring tourists to small towns and cities.