Do not under any circumstances get too down on yourself. You stepped up to the plate. You put in the time, you did it for the right reasons. This epitomizes what we are up against and is a valuable lesson for everyone moving forward. I certainly would not let them off the hook though. I would get this information out to your friends and neighbors, maybe even write an editorial in the local newspaper. You may even get this story to go national if you worked it right. However you handle it, keep it in perspective and thank you for this important information.
πολλα γαρ πταιομεν απαντες ει τις εν λογω ου πταιει ουτος τελειος ανηρ δυνατος χαλιναγωγησαι και ολον το σωμα