You have to be mentally unbalanced to think it's ok to damage a car that is not parked how you want it to be.I'd say you've every right to do whatever it takes to get past a car that is illegally obstructing your legal right of way. Why put yourself in the dangerous position of walking in the road to protect the property of an arsehole?
Why should the world adapt to the car?
You claim you are worried about putting yourself in dangerous situations yet you also claim its a good idea to damage people's cars which will definitely put you in dangerous situations when the car owners confront you. Or will you be choosing your victim's carefully?