I'm usually pretty slow to report people for cheating, but I did play 4 games yesterday and was killed in 2 of them by people who where obviously using hacks.
One of my deaths I was in the middle of a warehouse and was shot 4 times resulting in my death in the game. I checked the replay, and there was the other player on the other side of the town in a building randomly shooting towards my building through another building. If I was guessing their bullets probably went through a couple walls with some sort of auto aim as well. Went ahead and posted the video, it would be nice if Blue Hole would give kickbacks for helping get people banned, since they are going to just turn around and buy another key. The last minute or two is where it gets really crazy, they aren't even trying to hide it.
The other one was more sneaky. I found this one by checking the replay, and found that the player drove into the zone, and walked up a hill with no line of site on me. Then they waited a few seconds behind a tree, probably to avoid the deathcam showing that they knew where I was, before shooting me 2 times with a k98. As they were walking up the hill they had their site pointed directly at me.
Here is the other video, this one isn't the whole match.
Both of these were in the US servers.