Joe is ... well there's a 'regular Joe'... but then there's also Frank Zappa's 3 part rock-opera called "Joe's Garage", where the main character in the story goes from being a guy playing guitar on a Fender Champ in his garage band(good wholesome fun), to the point where he is imprisoned for things that might be best left out of the discussion here. The premise of the story is that Music, and virtually anything fun is made illegal , and follows Joe's life and various crazy things that happen along the way. Not a story for the feint of heart , or offended by vulgarity, but I've always thought it was a very cleaver ( perhaps one of Zappa's best ) piece of humorous and somewhat political satire.
So, LowSlowJoe, is just a regular Joe, trying to have fun doing BBQ Low and Slow... hopefully they won't make , making BBQ and other pellet grilling types of activity illegal any time soon.