Allow marking of incoming spam calls and display warning to users.
Skype-In numbers sometimes receive spam calls. Allow us to mark such numbers as spam and have a warning message displayed with incoming calls that come from numbers that have been reported for spam. That way we can decide not to answer incoming calls that others have marked as from spammers, and also report numbers falsely so marked. Numbers should be automatically delisted when no complaints are received for a specific time, e.g. 3 months. There should also be an option to automatically block all incoming calls that have been marked by the community as coming from spammers. https://www.shouldianswer.com have already developed such a system that can be used as a template.