Force me to follow through on threats... do precisely what I pre-emptively tell them not to do... bicker and pick at each other... whine and whinny... are awake past 8... won't eat the breakfast I put in front of them... mutter under their breaths in response to something I have said...
fight, don't listen and do things that they know they are not allowed to do. It amazes me that no matter how many times I tell them not to do it, after time outs and having privileges taken away they still continue to do it!