Having never been taught anything on the guitar, I probably still make all the same mistakes which may well be laughable. I am musically trained though (piano/viola), so that side of things is pretty well covered.
I am acutely aware that my playing is not everything I want it to be, though.
Still, at least I've never played a telecaster. Wouldn't want people thinking my bread is buttered on that side, now, would we?!
Roo