Having only been instructing for a short time, I was anxious to see if the scare stories about 101 ways students will try to kill you was indeed accurate!! Thankfully my experiences have proved otherwise and most students have been keen, committed and serious to learn. Unlike a friend of mine who nearly had a sticky ending when a student - older, richer, over confident etc... - thought he knew it all and promptly tried to pull the mixture twice, wouldn't hand over control when instructed and finally almost made it into controlled airspace.!! Suffice to say the flight didn't last long...
I think as instructors we have a certain duty of care to ensure that those we are teaching are fully equipped to enter the big wide world of GA, safely and competently. Don't slack on checks, airmanship, accurate flying etc... Yes flying is meant to be fun but standards have to be kept to ensure it stays that way!!