It's interesting how so many folks think that they know about good and bad form. But there are 2 kinds of ignorance:
1) The kind that MOST of us have, including me (runner and track fan for >40 years) - i.e., not knowing sh** about biomechanics. What is supposed to be where, when? No clue. This is probably hard to fix, as you'd have to LEARN about biomechanics, and depending on your sources and mental make-up, it might be hard to understand.
2) The OTHER kind of ignorance is far less defensible: It's the "good form is pretty" (or at least not ugly) view. Now, those who practice it would deny that they're being that simplistic. But in most cases (without the knowledge of #1 above), they almost certainly are. They'd say that Grant Fischer has good form. And the slow freshman XC runner all over the place does not. Fair enough. EXCEPT for the fact that at that SAME XC race, if large enough, you'll see MUCH faster runners who do NOT look anything like Grant Fisher - and sometimes roughly as bad as the aforementioned slow frosh. And you can spend ALL DAY on YouTube watching world class runners who don't look nearly as pretty as Grant Fisher. Indeed, way worse. Hell, JUST start with John Ngugi. And then Salazar. And Zatopek. And Tananguchi (sp?). And dozens or hundreds of others, depending on how much time you want to waste.
With all due respect, it seems like such a lazy form of ignorance.