I had a hospital birth with dd. I didn't have any vaginal exams that I didn't request, except 2. The entrance exam(to see if I was in active labor) and later on when her HR dropped they wanted to touch her head to see if her HR would go up(it seemed like the least invasive option for me at that point.) They didn't give me a hard time about it.
They can't make you do anything you don't want to do. They're not going to kick you out of the hospital. I would actually bet that forcing you to have a vaginal exam could be considered abuse in court. Declaring you incompetent just so they can see how dilated you are seems like a legal stretch that I doubt any hospital lawyer would want to take. If someone threatened me with that, I think I would ask to speak with someone from their legal department, and I also think I would tell whomever was threatening me with it that I was going to call my lawyer. I seriously doubt that would happen just for a vag exam, though.
A hospital can dictate policy, like no food during labor, but you can either sneak it, or go to the cafeteria or hall way and eat. Again, they can't keep you locked in your room. I was all over the hospital during labor. You can insist on a heplock, so you're not tethered to the IV when you get your not getting the ABX, if you're getting them. I was not GBS+, I didn't have an IV, or a heplock. I also refused to wear a hospital gown and only allowed them 10 min on the FHM an hour(they either came in and took it off or I did.)
I would bet that if you stay home long enough, you might be able to skip the entrance exam when you get to L&D. You can tell( I would especially hope a nurse could!) when a woman is IN labor. Talk to your doctor about it and he can put a note in your chart. She may be more hesitant about no exam when you want to start pushing, because sometimes you can still have a lip of cervix, or feel the urge too early, but you should certainly be able to discuss the option with her. If you want to refuse them all, like I said, they really can't make you do it.
That being said, hospital birth still kind of sucks,IMO. I would go for an HB or birth center if you can and are willing.