Yeah, I understand like a little mistake here and there, but it's especially annoying when people on facebook are in a stupid comments fight trying to sound smart but the ENTIRE TIME all you see is incorrect your's and there's.
Not really. Everybody makes mistakes typing on the Internet. My spelling and grammar are pretty good but I make my share of blunders (for instance, today I typed "one" when I meant to type "won"). Sometimes my brain takes a vacation.
But the thing that DOES annoy me are texting abbreviations (I never answer questions typed like that.
It's unreasonable to expect everybody to have the same ability, especially kids who don't yet understand the need for clear expression.