Boundaries

I wrote this after someone crossed my boundaries.

There are many lines on the Earth
Some are open for public use
Some never should be crossed
For peace and order we have them
For places to stand we have them
They tell us where to go
They tell us where to park
They tell you how far you can go
They tell you if you are allowed in there
Boundaries are what I speak of
Please do not cross them
For my safety, as well as yours!