How to set up CRM lead scoring rules to avoid misjudging customers?

If CRM lead scoring only looks at whitepaper downloads or email clicks, it's easy to mistake curious users for good customers. I once saw a rule where opening three emails added a lot of points, and as a result, the leads ranked at the top for sales were students, consultants, and vendors, while actual customers with budgets were pushed down because they had fewer interactions. Now, I prefer to…