Then why would he specifically ask about players that play through all sections and chapters and the menu? I'm pretty sure he's asking if it will play every bit of data on a disc without having the user do anything.
When I saw the thread title, I, too, thought, "He either means region free or maybe universal for SACD and DVD-A", but I'm pretty sure he means "play all the stuff on a given DVD."
Don't believe everything on the Interwebz! A duck's quack DOES echo!