[e40]

The numbers are random so why would sharing the numbers help reduce anything??

I never get calls from the same number. I've had the same scammer call me 3 times in one day from 3 different numbers.

This is the scammer that has called me 100s of times in the last 2 years: http://www.caribbeandiscountsinternational.com/about/

I tried to contact Tucows to complain, no way to do that. Then, I filed a report with ICANN that Tucows was violating their contract (because I can't report abuse), and that case was closed after two weeks.

The entire system is supporting the scammers.

[MBCook]

You’d be surprised. Maybe YOU don’t get calls from the same number (though I do at times) but it seems like scammers will use one number to call 100,000 people then switch to a second number and call again. So as long as someone reports it lots of people will benefit. It’s not a random number per call, which would make this approach unfeasible.

This shared block list is basically how Nomorobo works and it’s quite effective for me.

[Steltek]

It seems like you don't need to have a complicated hashing and sharing network for that. A braindead scoring algorithm would cut the scammers off at the ankles.

[reaperducer]

And when some scammer uses your number (since any number can be used by a scammer, it's just a number not a phone line), then under your scheme, you get cut off from all of your friends.

[e40]

This. Given the quantity andlocality of the numbers to mine, if I block them, it's only a matter of time before I block a number that matters to me.

[e40]

but it seems like scammers will use one number to call 100,000 people

I seriously doubt that, given the locality to my own number.