There is an automotive shop here in town that has a sign that reads, "thanks to YouTube mechanics,our shop is always full" being an automotive/heavy duty tech my self, i do ,at times get the" but i saw a guy on you tube that ......."( fill in the blank however you want) . Now, a small precent of them do know what they are talking about, the rest know just enough to be dangerous and leaving one scratching his head asking "really?"