Smex

Sometimes you can pick up an un-up-pickable(?) item by looking at it and pressing enter. Also make sure, as SystemiK said, to remove all the junk around it first.

Sometimes you can step over them, sometimes you can't. Sorry, I know that isn't very helpful. When you can, it's usually when the barbwire has sunk a bit into the floor or is next to stairs or similar.

DayZ appealed to me since I like the post apocalyptic setting, I read book like The Road and Metro 2033 and watch TV series like The Walking Dead, Jericho, and semi-frequent r/collapse on reddit (probably because I secretly suspect that the world is going to shit, aaany day now..). The Crime & Punishment and Bandit Campfire subforums occasionally offer some nice reads, eventhough the stories mostly consist of neckbeards' wet dreams with plotholes you could drive a truck through. Theme Parks and sandboxes, EVE and DayZ being sandboxes. The thing is that EVE isn't as sandboxy as it seems, it has mining, ratting, mission running, plexes, scanning, trading, hauling, POS operation, R&D and whatnot. As it seems, DayZ only offers looting, shooting and repairing vehicles.

.. The faint writing is saying that you connected to a server that isn't the same version as your game. Before you connect, check the version.