Let the kids wear mascara and have their own thing. There's no point in mocking them, or complaining that it's not as a good as whatever it reminds you of.
I remember listening to that one Jimmy Eat World song back in high school. It was that really annoying song that sounds like they're stuttering "everything, everything will be alright, alright."
I still don't know what emo is...I'm assuming a certain dress/attitude? Either way, as long as they dont kill anyone, let them be...