What if,
A special interests group X sued a government agency that has law making authority on the grounds they overstepped their bounds on a recent decision. The agency won and the case was dismissed by laying down a clear directive for their operational procedures they have always used as their defense....
...A year later that same governmental agency is coincidentally faced with another decision just like the one in the court case. Instead of making the decision using the same operational procedures they literally just legally testified to using, they instead do the exact opposite at the urging of special interest group Y whom they are cozy with.
Because of the tunnel vision for only their concerns by both special interest groups X & Y as well as being miles apart politically no one notices this glaring discrepancy but you. You feel what the government agency did was extremely wrong and are outraged by their actions.
You know that if you anonymously alert special interest group X they will go berzerk and without a doubt sue the government agency and easily win. The problem is you don't care for group X and were happy with the court decision so you don't want to help them even though you know they'll hold the agency accountable for their actions which is your ultimate goal. This option would require very little effort on your part and accomplish your goal but there will most likely be unforseen positives gained by group X creating possible unforseen consequences you might not like.
Even though you are more aligned politically with group Y you still can't stand them. It disgusts you the government agency pandered to them and the resulting decision really chaps your azz. You are willing to file a lawsuit to see it overturned and teach the agency a lesson but that would mean negative personal exposure for yourself not to mention a shyteload of time, effort and possible expenses.
Another option would be to meet with the agency and discuss your displeasure with them and their reckless decision making and putrid hypocrisy. You explain what you have on them and tell them the two options you're contemplating and then inform them of a third option; they overturn their decision and upset special interest group Y which they don't want to do. This option saves you from many of the other downsides but now you've exposed yourself and essentially threatened a government agency that has known and probable unknown power over you.
What would you do?