It's always the illiterate who point out two spelling mistakes and harp on about how it makes a blog entry unreadable.

There's an old internet rule of thumb that I've followed since my days on the pre-WWW internet.
If, when responding, all you are doing is correcting someone's spelling, you have lost.

Corollary: If, when responding, all you are doing is pointing out that someone has bad spelling, without pointing out the spelling mistakes, you are a loser.