I was just talking about this earlier. If I am on my way to a hospital, airport, or work, and people block the road...it is going to make me pretty angry.
Blocking the way is going to make me angry. Surrounding my vehicle is going to make me fearful for my personal safety.
When someone is angry and fearful for their safety, they can become unpredictable, especially if they feel trapped by being surrounded.
I have no sympathy. None. These people deserve fully to be run down if they are blocking a public way and surrounding a car.