I find it a tad annoying when people do that, and most times i would simply ignore. I do flag 'em sometimes but i figured what the heck, my flag isnt worth anything. But at least its there to show disapproval.
BTW, i think that song is cool! The concept was like Meghan Trainor's 'All about that bass', except this one doesn't have chubby ladies. ;-)
Edit: OMG she actually said that at the end. lol...
Gotta fight spam somehow. It seems to have cut down on a lot of spam comments so far.