I won't include the "freemen" thing in Montana, 'cause those guys apparently just ripped people off, and it was resolved without mass slaughter. Thievery is not a matter of principle. The media tried but failed to link them with the Militia of Montana.
In all cases, though, the issue at hand could have been resolved, or the 'suspect' captured under other circumstances and probably without any gunplay or other violence.
Have these stopped or just been kept quiet better?
Quiet better, different strategy... no time to post details, but there are lots of milita and 2d Amendment rights activists being entrapped to commit technical violations (on the word of informants facing many years if they don't cooperate-- i.e. liars)... I've noticed a bunch of these... multiple arrests, big news splash about machine guns, links to crime... but it is just a gun dealer who committed a minor violation who winds up serving hard time with everyone involved who won't play the same game on the next person on "the list".