Don't they teach proper grammar any more in school?
Isn't anymore one word?
In any case, yes they still teach grammar, but the bar is significantly lower (I'll leave it at that to keep this thread less political). Many simply argue that when they type sloppy, disregarding grammar rules left and right, that it's because it is a forum, not a white paper or dissertation and the communication is still occurring. "What's the big deal?" is a typical response.
To continue on topic, I agree with all those who hate the abuse of LIKE. I also recently found out that my wife hates that I use the word anywho.