We have been using the disturbing the peace system with good success. What do you suggest in the situation where one child is out of the house when his siblings get strikes? For example, Child A is out of the house from 9-12 and during that time Child B and Child C get 4 strikes. Then Child A gets home and contributes to strike #5. But he wasn't home when the first 4 were earned.
Yes, I know, this is is why God had to write hundreds of other laws besides the 10 commandments. Sorry.