Is there a way for a player to remove the barb wire fences? I've seen zombies pass right through them, but i can't get through them which is kinda dumb.

Right! I've never even seen a toolbox. I'm just a noob that dies a lot, 50% of time another player is shooting me even when i'm being very sneaky.

Your minimal survival kits for newly spawned players would make a lot more sense if it was ever possible to out-run the zombies. But basically the zombies can run faster than you can and will always catch up to you. And as a bare minimum I really think that a canteen full of water should be included.