Okay, "drive by shot" uncalled for.
I consider it bad form to throw bricks at people who aren't within five miles of a given thread, even on Flame. It smacks of scraping keys on someone's parked car while they're not around, or trying to score debate points when the opponent isn't even on the stage.
If the person is participating in a thread on the Flame board, and throwing bricks of his or her own, go for it.