Law and order must be maintained outside, especially in highly populated areas. Without order, we would have chaos. It is right for others to not have their rights violated when outside in any public space that is governed by a ruling body. However, just because there are rules does not mean it gets followed.
In fact, an individual is constantly at risk of being attacked by other individuals when outside. Anything could happen, and that is a risk everyone takes when they step outside and possibly run into individuals. Most people are not out to cause trouble, but there are always certain individuals who have bad intentions.