[Mendacious]

Well Hero is clearly in questionable territory. Calling a raise pre-flop with QQ99 is marginal. But you are looking for a Q or a 9 and no overcards. Your flush draw sucks, and playing the Q9 straight just because you have another queen with 2 other players playing, to me, is putting your head in the sand and praying for your straight flush draw.
Its not a situation I would like for a lot of money on a regular basis.

I think the "two blockers" mentality is a trap. When I favor analysis like "two blockers" over my read on the players and betting I usually get slammed.