Teenspeak grammar will always be irritating to some, that is the whole point of it. It sets them apart from the older generation (or old farts) and is a form of rebellion to conform. I was listening to a group of girls on a bus saying 'I'm like this and I was like that and it was just so cool'. This way of talking is quite widespread from state schools and public schools alike so it isn't a class thing either. But I do wish as with other trends it passes as quickly as possible.

The great thing about it is that it evolves so rapidly that very little of it actually gets into normal usage. Words and phrases that were the absolute height of coolness when I was in school are completely unknown now. And so on it goes.