What are you supposed to do when you have blacklisted 100 numbers it seems stupid to me that you have to start unblocking blacklisted numbers. My Mother in Law has already been scammed several times she is over 80 and has dementia. I am sure all phone companies could do more like being able to block area codes and numbers from abroad.
Blacklisting is a complete waste of time, the list of numbers is infinite. The only sensible way to stop scammers is a whitelisting phone.
Do you seriously think if it were a trivial matter to stop scammers phone companies wouldn't have done so?