The one that drives me nuts is people who don't know the difference between "to", "two" and "too" and "threw" and "through". Like... "I had to many too count so I through too of them away threw the window"

...arghhh...


...that and guys who talk like they have speech impediments.
"L8tr tht nite i tuk u two the zoo"

uh.. wud u repeat tht plz.