Okay, time for a confession. Misuse of punctuation and spelling errors tend to be rather large pet peeves for me. Especially in papers I am grading and in a context of something that's supposed to be professional. So, occasionally when I am bored, I peruse blogs such as The "Blog" of "Unnecessary" Quotation Marks, Apostophism, etc. Just as a disclaimer, these sites are not necessarily run by people with low tolerance for crudeness. They are pretty clean in general, but you definitely run the risk of coming across vulgar language if you choose to read the blogs.
Today an old entry on English Fail made me laugh out loud. Look at the second comment down, and think back five and a half years.
Edit: This and this also really tickled my funny bone. I cannot vouch for the cleanliness of the comments.
Why do misspelled signs make me giggle?