Walking into the world of home security blind is a great way to waste money. I've seen it happen more times than I can count. Someone buys a security camera system based on a flashy Amazon listing. They install it. A month later, they realize it doesn't do half of what they needed. Or worse — it does nothing at all when something actually happens. Don't be that person. Before you click "buy" on any dvr camera system or wireless security camera system, sit down and answer these seven questions. They'll save you time, money, and...