Re: unacceptable behaviour
I agree. This is normal 4 year old behavior. Personally, I thought that 4 was *the* hardest age. They have alot of the same tantrums as they did at 2, but we expect them to know better.
Calmly (preferably without yelling) stick to your guns.
There is a great book called "SOS! Help for Parents" by Lynn Clark, PhD. It helped me more than any other when my kids were that age. A counselor recommended it to me. I couldn't find it in a bookstore, but I could order it online.