Rick Stanley, of Denver, Colorado, is the "revolutionary militia" and Libertarian Party candidate for the United States Senate. Libertarian activist Claire Wolfe, one of the cult's most popular and frequently quoted members, penned the notorious phrase, "It's too late to work within the system, but too early to shoot the bastards."
Even though they advocate a violent revolution, (well rick may I don't know much about him, claire says we aren't there yet but tends to think about it longingly) it's not an anarchy type world they are after. They are (according to them) after a return to the ideals of a government bound by the constitution and the bill of rights. Primarily they wish to see all the inherent individual liberties restored because they percieve them to be gone or limited. Creating 'spy files' on opposing political factions only tends to gives them more ammo in which to reload and is a tantamount sign of tyranny in many societies.
However, I would acknowledge that pretty much all armed and violent revolutions go through a period of anarchy in one form or another. Is that what you are afraid of? An actual revolt and the transition period? Certainly you are not afraid of the stated libertarian endgoal of a return to a constitutionaly bound republic form of government. Or is that unfeaseable in this point in history in your experience and thoughts?
Personally I still think that we can work with in the system to restore those freedoms via elections, apparently there is 50% of registered voter that do not vote, if they decided to vote for a candidate with some dignity and sound ideas then the republican/democrat cult of corruption and greed would be trounced. But that isn't going to happen for with the current Libertarian causes, IMHO. So you really have nothing to worry about.