John Denver is changing homeless attitude towards police for camping
Explanation:
John Denver is thinking to change the homeless attitude of people. Because most people are not in the home nowadays. They are going outside of their homes.
To change that attitude John Denver is expressing that point in lines 6 through 12. If they spend time at home means they can spend time with their children, mother, father and with all their family members.
This is the reason why John Denver is changing their attitude towards homeless people.