I'd be pretty upset if they start targeting Jon too much because he called out the plant. If that's the case, it's probably because he ruined some kind of epic reveal prank or some shit. I don't have much faith in them not letting this shit get personal, especially if Damiel is going to be heavily involved in the crew from here on.
I understand the desire to create some friction, but that should be what the sharks and Goldstriker are for, not some kind of inside man. Hell, they could just as easily have given off that impression by continuously hinting about plants and pulling certain fish aside far more than usual. They may have needed a last minute fish, but letting him keep a phone really makes shit seem artificial.