A tactic that I recently encountered is the caller spoofed my own number. It is probably a good move on their part because your first impulse is not to block your own number. However, after I received this a second time, I gave it #2 and it is gone forever. This is a never-ending war. What happens when spoofers get good enough information to enable them to start spoofing with numbers that I do not want to block? Not sure how I would deal with that.