"the purity of English"...?
In the words of James D Nicholl...
"The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary."
Kids have always created their own slang, some of it may get absorbed into the language, but most of it just dies off and gets replaced by the "next thing" to come along.
Making a big deal about it just makes kids *more* likely to use it because it annoys the older generations.