Dear Withheld, go to hell

I'm sorry, but this can't wait till Friday. I have a declaration of war to make: I am declaring war against the people who phone me and who appear on my caller display as "WITHHELD".
If I call you, and you have caller display, you will have my name and phone number. So, what's with this "WITHHELD" crap? Is it for people who are too bloody important  to be identified? What are you saying: "We can phone you, but you can't phone us! Na na na na naa na!"
Well, stuff that for a game of soldiers. I DO NOT RESPOND TO WITHHELD NUMBERS.
If it's important to you, and you don't want me to know who you are before I pick up the phone, send me a postcard instead. Preferably a funny one.