Just don't sell it and don't tell a bunch of people about it and you won't get caught. Its when you start trying to sell it to make money is when you get caught. The cops aren't actively looking for someone growing a few plants to smoke for themselves, they are looking for commercial ops. That's not saying that if you get busted it will be any easier on you, but really, the only way you're getting busted if you're not selling it is if you tell the wrong person and they rat you out. If your laws are that lax to where GROWING 100g is just a $100 fine, I don't think you have anything to worry about.