Is this play justifiable?

[maurile]

This is from my home game.

Five-card stud, lowball. One down, four up. Quarter ante, high card brings it in for 50 cents on second street. Spread limit, $0.50-$3.00.

(I really like this game, by the way.)

There are two bad players in my home game (out of six). One is really bad. This is a play he's made several times. He's somehow convinced it's good poker. He's ultra-aggressive in general and I guess this is just an extension of that, but it's the most misguided aggressiveness I've ever seen.

On fourth street: (heads up)

Player A: (X) 4 9 3
Player B: (X) 7 6 2
Pot: $5.50

Player B bets $3.

Player A <font color="red">raises</font>!

I seriously can't think of a worse play in poker. Player A thought it was a good bluff! I can't fathom how he thinks he can bluff a guy who knows with 100% certainty whether his hand is good, but that was his rationale.* Seriously, was he trying to represent a six high? His nine is showing.

Obviously, Player B didn't fall for the "bluff," and re-raised.

------
*He voiced it after another player criticized his raise. I defended Player A, of course. "You won't make any money at this game playing like a wuss."