I use 800Notes to see if a number I do not recognize is a potential scammer, and to report a scammer when I have actually answered their call. I am sure scammers and telemarkers are upset by this service, but we have the right to tell others who they are. I like to label them on my phone, so when they do call, I ignore them. They do tend to be persistent and change their numbers over and over, so it is never ending job to inform people and to help them keep their money in their own pockets.