I have a similiar question...

Is it ever common practice to take a away an out or so if you read another opponent for a flush draw in a 3 way pot?

A hand I played recently illustrated this. Essentially, I had the Ace of clubs and the flop was 3 low clubs. Early position bet and on the flop and turn both another player before me called and I called. If my read on the player before me is right and I believe he has the K or Q of clubs, should I ever take that into account when determining my outs? Or is it too likely that your read is simply wrong for it to have an effect on what you believe your odds of hitting the flush are?

Flame away if this isn't the right way to think about it.