Or not. Many of those calls use spoofed caller IDs. Not only are you not punishing the spammer, you're adding the number of a random person who have no idea this happened.
Sorry I didn't spell out everything for you. You should also feel free to do some investigating of your own, for example, call the number that appears on your caller ID. Depending upon who answers the call you may or may not choose to proceed with punishing the spammer. BTW feel free to propose a better idea if you actually have one...
I didn't say that for you. I did it for the people who are not aware of this issue. Are you upset that I gave people more information, so they don't try to block legitimate callers?