There is a glaring problem with this rant: The venue in question is YouTube. I am not exaggerating when I posit that the people who comment on (and by extension, upload) YouTube videos are quite possibly the stupidest people in existence. YouTube is a vast seething morass of idiots, united together into a gestalt force of stupidity, capable of generating previously inconceivable amounts of idiocy as a result of this unholy union.
The point I'm making is that YouTube is chock full of idiots, if you somehow didn't pick up on that.
Getting mad at anything people on YouTube do is giving them entirely more credit than they actually merit - it is best to simply shake ones head and feel shame that you share a species with those 'intellectuals'.
Also getting mad at stupid stupid idiots for misidentifying genres of music is a silly thing to do; it also overlooks the tendency for any given genre of music to be 'defined' - in the eyes of the ignorant - by the very worst examples. People who claim to hate metal invariably pick the sub-genres that least resemble music as their justification (with the insinuation that all metal sounds exactly like that), people who say they hate pop pick the most obnoxious crap imaginable as their example, etc - the lesson here is that people who make sweeping generalizations about subjective mediums most likely don't give a crap. So neither should you.
Also referring to yourself as a TRUE [metalhead, rocker, etc] has the unfortunate side effect of making everyone take you less seriously, and the people who enjoy the music you're defending just find you embarrassing.