Yeah, well YOU send good thoughts!
I have 1278 friends, which means about three birthdays every day. Who made Mark Zuckerberg emperor of All Creation? And, why does he care whether or not I send birthday greetings?
Btw, my real friends, who are all over 19, never put their real birthdays. We know each others birthdays, and don't care to "share" the information with a kid tech zillionaire who's toying with the idea of running for president. (Elect me! I know your birthday!)
BACK OFF, Facebook.
My to do list is long enough without adding birthday greetings to everyone I ever accepted as a "friend" on Facebook.