I am up to level 28, and level 15 in Dark Zone.
What I have noticed about the Dark Zone is that it is virtually impossible to play solo, and not because of other players going Rogue. The fucking NPC mobs are crazy. It didn't matter what level I was - I tried when I was lower level, and last night - but the NPC's are just so many in number you can't move from block to block. When I did manage to find another player, we were able to deal with NPC mobs pretty handily though.
I am happy to start a second character if anyone wants to level up together, or I can bring my main character and help you level up quickly and build your base up. I should be on a bit over the next couple evenings.