Actually - troll or not... I agree with Joe. Who ever marketed this incomplete software should be ashamed. Bookmarks are not the same as highlighting or underlining text. Heck - a bookmark isn't even the same as adding in notes on top of text. A bookmark is used to mark a specific text area that you might want to study further or where you left off reading (another example of a software developer on a different planet when it comes to how people would like to use their computers).
Reader, and just about every other PDF viewer out there, had the ability to highlight, underline, add notes directly on top of text, and add bookmarks. So, just because Joe didn't elaborate on why you should be ashamed doesn't mean he's a troll... He, like many of us, are very very very unhappy with this product. Clue number one - see what your competitors are doing and do it better! Oh, I'm sure you've made the throngs of people happy with your DRM solution but are those same people going to be as happy when they have NO customers because the usability of this incomplete, rushed out the door, software has scared everyone away.
Joe summed our frustrations up quite nicely - "Does laziness always have to be the bottom line for software developers? Adobe should be ashamed".