[fishyak]

Thinking about folding the flop is the right question, but: 1) Give yourself 2 extra outs for the BDFD. 2) No one has shown signs of strength, limiting the chance of a good flush draw being out against you. (There are more than enough opponents that an A or K high flush draw should raise for equity.) 3) Implied odds are a +. If you do hit, 67 should have gotten better action than it did.

Crappy board and fold by CO tells me that you were predictable, too. Everyone put you on a hand that was big enough that they didn't even want to try to chase down your turn raise. But you did need to protect against even a weak flush draw so raising the turn was right.