I don't necessarily agree with it, but it got me thinking: social pressure can derail disciplinary plans.
http://online.wsj.com/article/SB10001424052748703407304576154823958400118.html?It seems to me that I recall when I was a lad, when other kids got grounded, it meant for example no birthday parties. (I never got grounded. I was never allowed to do anything in the first place.)
I understand that you don't want to punish the kid whose birthday it is. I can see how social pressure can derail discipline. I think that grounding means "no fun" and part of the punishment is having son/daughter hand over the present early or late, while delivering an apology for not being able to attend due to being grounded for offenses committed.
That said, I was a pushover. But my kids usually behaved appropriately, especially outside of the home.
Perhaps as important, and possibly even more important, is the reprimand itself. There is a certain art to delivering one--including to adults--for example, people you supervise at work. The general form is
"You did this thing, and as a result, this thing happened, which produced consequences that you have negative emotional attachments to, so now you need to change your behavior in a specific way, so that next time X happens, you will do Y, so that the future will be that much better."
The usual form of a reprimand is "you bad boy, you did this thing, I can't believe you're so inconsiderate, no good, this is what I get for trusting you, why oh why don't you EVER listen to me, you ALWAYS do this, yackity yack, yackity yack (don't talk back)..."
In other words, parents are prone to criticizing the child not the behavior, and getting stuck in the problem not the solution.
Keep the attention focused on the behavior: what (s)he did wrong, and what (s)he needs to do instead. Where attention goes, energy flows.
There does need to be a "sting" in the reprimand; you need to tie the consequences to something the child has strong emotional attachments regarding. For example, "you make me SO MAD!" only works if the child has a strong need to keep you happy. Which might be true, but you're also instilling the idea that the child is responsible for your moods. Bad message.
Better bad news is something that is more of an objective fact, and the child is highly likely to care about:
"Now your friends don't trust you anymore"
"Now Grandma feels bad that her favorite dish collection is missing the one you broke."
"Now your cousin can't play in the game, because he got hurt because of your horse-play".
Then you work the conversation towards the solution, which involves a specific change of behavior in a form comparable to "the next time this happens, you'll do this new behavior, which will produce this improved result".