Interesting question Mr./Mrs./Ms. Jack.
The answer is very simple; pragmatism. Some of us would rather not divulge our true identities to the general public for reasons that should be all too obvious.
Privacy is of great value to us so it stands to reason that we would take steps to guard it as I assume you have as well.
Dagger Jack...of the California Jacks?
"We are evolutionaries in the purest sense of the word. Spiritually and intellectually we are transcending a world grown rotten and we are transvaluing values, because for us, the highest value is irrefutable."
"Delay is like Death"
Peter the Great.
"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm."