>>  What's the point of these websites then?  <<

Apparently you neglected to read and understand the material at the top of the entry page.
Here it is again.  Try reading it for comprehension.  Note that nothing there says we will shut down any callers.  All we can do is try to educate visitors who are willing to be educated.

Are you willing?

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800notes is a FREE REVERSE PHONE NUMBER LOOKUP database built by YOU, its users. Our strength is in our numbers - by sharing pieces of information each of us has we are putting together a free and public phone number directory with information no other service can provide.

Find out who is calling and why: Debt collectors, telemarketers, charities, and survey companies often call without leaving a message. Lookup the number to read the reports of other users.
Report telemarketing calls: Make the Do Not Call list offenders notice the problem by reporting their practices. No business wants bad publicity.
Report phone fraud: Did someone try to scam you? Reporting the number is the fastest way to make public aware, and prevent others from falling victim to the scam.
Check out a business: Read other users' feedback about the phone number owner.