It happens in every industry. Thats why you must do due diligence before you sign up to a school. Ask everyone including previous students, thank goodness for the invent of forums such a this. Do your homework thoroughly before parting with your money. I knew of one old coot years ago that used to have his students refill the training aircraft (PA38) with .....MOGAS out of an unfiltered drum! These guys are never successful no matter how long they operate for.