Heres an article from the Combat Arms Wikia, (HackShield - Combat Arms Wiki - Combat Arms maps, weapons, guides, and more)
"HackShield is the current anti-hacking system on the Combat Arms engine. It detects found hacks from previous stages of the game and abruptly shuts down the game on the hacker , it is also known to silently report players via log to Nexon. It is unknown if the shield would work on hacks that weren't blocked by Nexon, that is, if it would report it to Nexon even though it wasn't discovered yet.
HackShield changed its loading screen during the early months of 2009. Instead of showing its trademark "Shield", it now randomly generates one of the second-generation Combat Arms wallpapers that can be obtained on the official Nexon website for Combat Arms."
Hmm. Interesting stuff Nexon... Theres one bit I wanted to read again,
"it is also known to silently report players via log to Nexon. It is unknown if the shield would work on hacks that weren't blocked by Nexon, that is, if it would report it to Nexon even though it wasn't discovered yet."
So... It reports you? If it crashes your game?
Also, just to add to this little discussion thingo majigo.
-Ive heard a rumor, as soon as you get reported, Combat Arms takes an instant screen shot of you screen. And sends it to Nexon America.
Nexon then looks at it and takes action? Because I've been crashed probably 21000000 times attempting out dated hacks. And it's all gewd
Is this true? Or is it just bullocks. (Lol bullocks)
[Discuss]Then eat cheese.