Stupid time to c-bet?

[Silly String]

I C-bet most 50NL hands when I am the PFR, probably about 80% when checked to with position. Since, my c-bet can't withstand a re-raise here is this a stupid time or just an easy hand to get away from? Secondarily, how often do you C-bet a whiffed flop as a follow up to your PFR when checked to with position?
Villain sees 40+% of flops, so if he calls c-bet on this flop I shut down anyway.

Hold'em NL ($0.25/$0.50)
Seat 2 is the button.
Seat 1: passdsuga ($47.25 in chips)
Seat 2: pumbar ($58.80 in chips)
Seat 3: Treasu001 ($60.40 in chips)
Seat 4: ETOWNJAY ($45.75 in chips)
Seat 5: Wildefish ($19.63 in chips)
Seat 6: HST350 ($52.95 in chips)
Treasu001: posts small blind $0.25
ETOWNJAY: posts big blind $0.50
----- HOLE CARDS -----
dealt to passdsuga [8h Ah]
Wildefish: folds
HST350: folds
passdsuga: raises to $2
pumbar: folds
Treasu001: folds
ETOWNJAY: calls $1.50
----- FLOP ----- [Ks 9c Tc]
ETOWNJAY: checks
passdsuga: C-bet or no C-bet????

[gabe]

bet, its the only way you can win! you have nothing, so if they play back at you get away easy.

[johnnyBuz]

rep that king

[Silly String]

OK good, I'm not just spewing chips here. Here's the rest of the hand:

ETOWNJAY: raises to $7
PassDSuga: folds

What percentage would you say you are C-betting when checked to after a PFR?

[johnny_fish]

What percentage would you say you are C-betting when checked to after a PFR?

I almost always c-bet HU, unless I've got showdown value and want to catch some bluffs.

It's ridiculously exploitable, I know..