Uh...hate to defend Bowser again, but...
"Arf" is just a sign-off, like Dan Rather's "courage," or SDAI's smiley face, or R.L.'s "eat shit and die!"
Silly, maybe, but doesn't really connect emotionally to the subject of the post.
Current Events » in reply to It's Simple - Arf Is Not A Sympathetic Signoff For Such A Topic