They do it because they are looking for a confrontation and then they can post on youtube how they know their rights. I carry every day open never an issue but I dont take my m16 to town even though its legal and I can do it. Children is the best I can explain it they are lacking in some department and have to make up for it in some way.
"The people never give up their liberties but under some delusion." (Edmund Burke 1784)