One player announced , after folding, that he would have connected with the flop.
This...for what it"s worth...
isn"t collusion (unless the team players were somehow sharing hand information which has not been suggested)...heck, it"s not even soft-play.
It"s purely bad etiquette to announce that you would have connected with the flop but then at least all players (reading the chatbox) have access to the same information.
As I mentioned before, I think OP mis-spoke and meant soft/team-play rather than collusion and I"ll give him the benefit of the doubt.