Every single server is under attack from one hacker. Text appears on screen saying that the attacks will not stop until something called BIS_fnc_MP has been discussed on the forums. Hacker then launches all players across the map until they reach one point where they take fall damage until they die. Attacks seemingly last until the hacker gets bored.
All of online is completely unplayable. Games run for anything from 2-3 hours to 5 minutes, but are all eventually attacked (in my experience). I went through 8 different servers tonight, and every single one got attacked.