I suspect native speakers (particularly the teen-aged ones - and/or those who want to pretend they're still young and hip) are more prone to mangling their language than non-native speakers.

I get the urge to hit somebody/something when I see the way people spell things online oftentimes. But the German-speaking portion of the texts/comments/posts are in no way better.

(And I can't believe how many people can't distinguish between "they're", "their" and "there". Come on, it's not rocket science people!)