G.M.
My mother always said "I do not negotiate with terrorists". It wasn't until i became a mom that i truly understood what that meant. My son has just turned 3 and ATTITUDE! He doesn't throw many fits because when he does, he gets sent to his room until he can control himself and be respectful. there is never any yelling, time out, raising of any voice, it's simply "John, you need to go to your room until you can rmember your manners"
he has only thrown one tantrum and it was hylarious! he threw himself on the floor and was kicking and screaming. I stepped over him and said "When you're finished, I'll be in my room" and i walked out of the room.
he still cops an attitude and gets sent to his room until he can be respectful. he then comes out and tells us that heis sorry and tells us specifically what he is sorry for.
From what I understand, they are just going to push us to see how much power they have. Kids actually LIKE boundaries. it gives them a feeling of security. they know where to stop before heading out into the abiss of the unknown reaction.
Good luck. Sometimes mommy's need a time out too! :)