Picking off a bluff, or bluff C/R? BB w/ 99

[Phyreball]

So yeah, no reads. His flop bet looked suspiciously weak -- something like A/x that missed. I might even be able to pick off QQ-AA against a weakie, no? Does anyone ever make this standard raise against weak bets? I also make that raise with a set.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
5 players
Converter

Pre-flop: (5 players) Hero is BB with 9[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/club.gif[/img]
UTG calls, CO folds, <font color="#cc0000">Button raises to $0.75</font>, SB folds, Hero calls, UTG calls.

Flop: 5[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img] ($2.35, 3 players)
Hero checks, UTG checks, <font color="#cc0000">Button bets $1.5</font>, <font color="#cc0000">Hero raises to $6.5</font>

[KaiserSose]

His bet is not really a bluff, but rather a standard continuation bet on a flop that everyone could have easily missed. Why not lead out for $2 instead of making the checkraise? I guess the check-raise isn't terrible, but if he does have QQ-AA, you are in trouble because he's never going to fold, but that is besides the point. I just think leading is a lot simpler.