PM,
If you had done something wrong, a sensible, mature person would have let you known the error of your ways, get you buy into the resolution and check some time in the future, if necessary, that the lesson had been learnt.
You're acting like he was grounded for a month. His instructor didn't fly with him
that day. Seems to me a reasonable way for his instructor to impress upon the student the seriousness of the issue (though, based on the student's post here, I don't think it did the trick).
I know what i did was wrong but is it that big deal????