As you know, there are a lot of websites that offer cheats for Standalone right now.
Ok, we are in Alpha, and VAC is not yet enabled.
In the future the problem if you adopt VAC or PunkBuster is that "hackers" takes a couple of days to avoid the security systems introduced, every time.
But, if in addition to VAC you will implement "FairFlight" it will be awesome.
FairFlight is very, very, very innovative and effective.
"It does not examine the players' devices or perpetually look for the latest hacks. FairFight uses GameBlocks' proprietary GameChanger™ rule engine and database structures to evaluate players' gameplay actions and Make it a FairFight™ for everyone."