Homophones...

Homophones are words that sound alike but are spelled differently, and have different meanings.  They're a frequent cause of mistakes in written English.

Logan and Brandy are really, really fed up with the abuse of homophones.  So fed up that they've written a very funny (if a bit profane) page all about it, titled Learn Your Damn Homophones!.  As if by explanation, at the bottom of the page they say (complete with a link to an XKCD cartoon):

You think this is obscene? Do you even read any of the stupid shit you write? That’s obscene.

But it's more than just funny – you can actually learn something here...

Via reader Simon M.