What about pressing PLAY while in the DVD Menu to actually (gasp) play the movie? Instead you have to move the little [insert whatever the highlight is on this movie which is probably different than the last 10 movies you've played] over to the "Play" text which may or may not be easily visible and which may be already selected or be left or right, up or down or a combination of them. Then of course press "Enter"

DVDs (in general) are probably the most counter-intuitively designed products of the past 20 years in my opinion. The problem comes first from the design of the players themselves, having far too many buttons than is required for even twice the included functionality. Then DVD authors implementing restrictions and creating truly annoying interfaces (menu structures, and overall design).