Quoting Naaxi:" My friend was finally corrected for that exact mistake I noticed because he would always post things ... [snip!] ... And he has spelled it properly recently. Your/ you're always grinds my gears. Or definitely. "Definately" makes me shudder."
I get people on my fb who spells "Definitely" as "Defiantly"
There are a few people what substitute the word, "want" for "wont"
People who mean to say, "Lose" and instead spell, "Loose"
Or classic smurf like the classic misuse of the words, their, there and they're. Actually, I don't think some people on my friend's list realize the word, "They're" is an option. They usually put the word, "Their" in place of "They're"