What's the story with Gang War? Collision or no?

When I have a Gang War running, I can't just run right through them like I can with my other Thugs. However, if I keep trying, eventually I warp right to the other side of the group. I see this same behavior with doors in missions sometimes; occasionally, there will be some lag when you click to open the door, and while the mapserver thinks the door is open, my client doesn't. If I try to run through the door, I'll be running against the closed door for a few seconds until the server goes, "Why are you stuck there when you're moving forward? There's nothing there to stop you, you should be here now," and I warp to the other side of the door.

That's exactly the sort of thing I see with Gang War. The client thinks the Posse is solid, but the mapserver doesn't. Which is it supposed to be? Should I be able to walk through them or not?

I get the door warp quite a bit as well.