Legally it does not, plus if you touch them at all they could claim you assaulted them. Plus that puts you in a very risky situation since they can now very easily attack you.

Staying in your vehicle is a good idea because it's a barrier between you and the people blocking your vehicle. Also if someone then tries to break into your vehicle that will make it easier to convince a jury that you were afraid if they got into your vehicle they were going to hurt you.

If you are in a situation like that in the USA, stay in your car and call the police. If anyone tries break into your car and you feel like your life is in danger, drive away as fast as you can, even if that means using your vehicle as a weapon.