Yeah, car loan signing wasn't as bad and the bank and credit union folks I've dealt with were surprisingly patient... they are surprised when people actually read the agreements though... I think it makes them feel better knowing the person is actually reading what they are agreeing to. Also car loans are many times less complex and have less paperwork than mortgages (thanks in part to all the additional paperwork and contract(s) needed in order to prep the mortgage so that it can be sold to fannie/freddie).
The worst experience I've had with this sort of thing is under release from jail. I've been arrested 3 times for civil disobedience actions and each time on my way out the officer on duty told me to sign some papers indicating the conditions of my release, that I've received all my property, etc. Each time, when I began to read the papers before signing them, they've told me if I don't sign them without reading them, they would put me back in my cell and hold me at least another few hours.
After my first arrest, they would not release me until I signed a paper saying that I received all my property but would not let me inspect my property first. They put my bag of property on the floor across the room and said I could stand about ten feet away from the bag to look at it. Needless to say, once I actually received my bag, I found that there was property missing. Nothing of great value (a hat, a bandana), but it was still pretty irritating.
Yea. So, I should be clear that each time I signed the documents despite not having read them first. I did not pursue any legal action mostly because I did not have much tangible cost associated with the threats. Perhaps had I refused to sign without reading and they actually did hold me longer I would have some sort of case, but even then, what value will a court assign to 4 hours of my life? Police seem to have a lot of leeway to make your life difficult without much recourse.
If there's one thing I've learned about the legal system from my arrest and court experiences, it's that just because the police do something wrong does not mean that you can stop them from doing it. People don't get their miranda read, they don't get to make a phone call to let anyone know where they are, they don't get their medication, they don't get a meal in line with their religious or dietary restrictions, they don't get a clean bathroom, and they certainly don't get treated with any modicum of decency. Well, it's not really anything you can prove and even if you could a judge won't care much because it's hard to assess damages for intangibles like that and the public won't care much because you broke the law and deserve what you get. It's a pretty fucked system.
The guy I was talking to was amused when I actually read what I was signing while purchasing my car. It asked me to sign saying I had received something, which was going to be printed next. He said I was the first person to refuse to initial/sign the paper until I had seen the next item on the list.