I believe I mentioned this before, but I can't quite agree, 100%, that instructing a primary student at 250 hours is more responsible than taking second-in-command of an RJ or TProp...

If you're not a stellar Pilot, I can guarantee you that you'll be passing along some very bad habits, as well as not instilling good aviation sense into somebody that knows no better. These habits will follow your unfortunate student throughout his aviation career, possibly getting himself killed in an Arrow one day...

Just something on the other side of the equation to think about, to play the Devil's advocate here. Some may call that irresponsible.