1. I have never been hurt by barbed wire.. but have read others saying they have. I think I may have just been lucky so far XD 2. Yes you can throw them to distract zeds.
doesnt matter what the website says lol. Rocket.. you know the guy who is making this game says they are infected humans and so would die from gunshots like any other human.
Since they are infected humans and not zombies, I dont see the reason why a head shot should be the only way of killing them. If they were zombies I would agree, but Rocket has said numorus times they are just infected humans.