An Idea on How to Combat Spam Calls

I thought a nationwide movement/campaign might help to end these calls. Here is the idea: When a spammer calls, answer the call and set the phone down, continue on with your business. When the spammer (computer or real person) realizes there is not a real person there they will hang up. This will do two things. First it will slow down the rate a spammer can make calls, even if that spammer is a computer. This will make the spam campaigns less effective and will require more resources. This will help drive some of these people out of the business. The second thing it will do is tie up phone company resources, which would help force the hand of the phone companies to do something about this. Thoughts?