Gosh. Ever dealt with a union election? That's exactly the problem with non secret ballots. You vote for unionization and libertarians show up at your house. Libertarians are among the most violent people around.
But I don't know about 'union thug' being a myth: lots of actual violence back in the dark days of the last century. Carnegie brought in an army to bust up the union and it wasn't because they were meek lambs.
