Is it normal to wear disposable contacts far beyond the guidelines?

I think it's too much of a risk worth taking. I was talking to my eye doctor today and we were discussing the dangers of contacts. He said that people often push their luck and misuse them. The risk of a fungal or other infection is apparently rare. You should follow the instructions. He says that if the contacts don't feel right: (uncomfortable, dry,etc) and your eyes hurt, you need to listen to them and take them out. The people who didn't follow the instructions often regret it and sometimes the effects are permanent.