I guess my willingness to disbelieve is a lot lower than most folks. The things you mention do in fact bug me to no end. I see it as sloppy craftsmanship. Your mileage may vary.
I use to let them bug me, but my friends always got mad at me when I pointed the flaws out after the movie. I've learned to try to turn my brain off for Hollywood. Even with that, I still gripe a lot about movies.
