If you are a current federal officer and you act in concert with private citizens who violate the law, that has specific legal consequences under the post-Civil War Civil Rights Acts for you as well as them.
You may not like the regulations that restrict you or your agency (who likes regulations?), but you are regulated nonetheless. You are a professional if you work for the government agency, not in the sense of being particularly good at what you do although you may well be superb at what you do, but rather you are a professional as opposed to an amateur because you are employed and paid to do what you do. A-Rod or Barry Bonds vs. the local college ballplayer.
So far, none of these private citizen groups have violated any laws. I don't work for them or with them, because I am regulated as to what I can and can't do.
But those regulations can not stop me from vocally supporting these legal private citizen groups or even donating money to them.