It sure isn't and this thread and several others on TFL lately should serve to show us what happens when people intervene in situations where they have no personal involvement and no understanding of what is really happening.
If you haven't already, give this thread a read to see what happens when people substitute guns for brains:
http://www.thefiringline.com/forums/...d.php?t=371338
Check the laws for your state regarding brandishing a firearm and felony assault, and then decide if your freedom, gun ownership rights, and possibly your life are worth getting involved in a situation where you "think" you know what is happening.