When I stick a disc in my player it normally will just start up to the movie for me. I've heard this problem before, part of that is player features, part of it is the specific title you're playing. Unskippable content is lame, I agree, but if I get a disc like that I can just do a direct copy of the disc contents with the protections removed and re-burn to a dual-layer blank. Now I can play it back on the player and skip content, no change in quality.
Wait, so let me get this straight. You and your SO make some steaming hot popcorn, dim the lights, and settle down on the couch for a movie night. You pop in your disc, only to find that it starts off with five minutes of annoying "unskippable" advertising. So your solution would be to get up, take out the disc, walk it over to the computer you keep in a separate room, insert it there, load up your disc ripping software, copy the disc to the computer, remove the disc, locate and insert a blank one, burn a new copy with the "unskippable" bit disabled, remove it, walk it back over to your living room player, insert it, and press play? Seems to me that serviscope_minor's solution of using MPlayer to begin with and simply mashing a single button to skip the advertising is a heck of a lot more convenient.