VAC does work as it's supposed to. It doesn't ban instantly, its delayed in waves, kind of like the xbox yearly banning. Only more frequently, I hope. This means hackers will have a fun few weeks or months before then ban hits.

One thing though, if you get VACced you can't play on VAC-secured servers. But MW2 doesn't have servers to begin with (lol). Are they just going to block you from accessing the MP feature altogether?