I believe I could. I love to read and frequently edit letters at work. I've never edited a large document though. Like most of you, I find it painful when I see things either misspelled or a misused word in books or articles. Drives me absolutely bonkers.
Another pet peeve of mine is when people completely omit punctuation! (frequent on Facebook) I find myself reading gibberish about 10 times over trying to figure out the writer's intent and give up because it hurts my brain. Even when I text, I write complete sentences. I can't stand "texting shorthand", such as "u" for "you".
OK, now I need a glass of wine.