Won't work. Caller ID is like the return address on an envelope. They can put any number there they want. See spoofcard.com for a commercial service that does this.

There have been a lot of calls offering "free" alarm systems in our community lately. It's the same message, but the caller ID is different every time.

And legislation? Where are you going to get the millions of dollars for lobbyists and campaign donations? That's what the industry spent to make sure the legislation we have is toothless, and that there's only a pittance in the budget for enforcement. Classic case of best regulation money can buy.