Many have experienced receiving calls from unknown callers who are just making fun and even worst, callers who are trying to scam. Economic crisis or simply having fun may be the potential reasons why people are doing that kind of game. If you are one of those who have received calls from unknown callers, let others know. You can help other people be warned by reporting your received calls from unknown callers at http://www.reportphonenumbers.com/. All you have to do is report the caller's number and leave a comment about that number. Don't forget to read the submitted comments from other users as a warming for more future calls. It is the best way to minimize the victims of those unknown callers.