I think making it easier to find exploits is actually a good thing. If everything is closed source and someone malicious exploits it for their benefit then that's all they're able to do. Open source at least allows them to contact you and explain exactly what the problem is. I think It's much better to get hackers on your side rather than banning them as they're probably going to be more willing to help you fix problems rather than using them to ruin the experience of others.
That's the attitude I'm going to have at least if people start hacking my game, I'll embrace it.