Have you noticed that all of the comments that are rated the highest on youtube videos follow the same pattern? To engineer such a comment, you must either play on people's emotions or their sense of feeling important/belonging to a club. Examples follow:
"Thumbs up if you (insert something to do with the song.)"
"Justin Beiber sucks and (insert name of artist) rocks!"
"(# of people) were crying so hard that they missed the like button/listen to Justin Bieber/need to go die in a hole." *note: said # is slightly lower than the number of dislikes on the song. (Apparently that intelligent remark didn't stop people from expressing their opinions.)*
And my personal favorite from today (this is a direct quotation)
"I hate it when people bring up Justin Bieber in every video!"
Oh, the irony.
Be aware of the formula. Armed with it, you could become obscurely famous.