Is the trending Facebook "privacy notice" necessary and/or effective?

Question

This facebook post has gone viral among my friends

PRIVACY NOTICE: Warning - any person and/or institution and/or Agent and/or Agency of any governmental structure including but not limited to the United States Federal Government also using or monitoring/using this website or any of its associated websites, you do NOT have my permission to utilize any of my profile information nor any of the content contained herein including, but not limited to my photos & videos, and/or the comments made about my photos, videos or any other "picture" art posted on my profile.

You are hereby notified that you are strictly prohibited from disclosing, copying, distributing, disseminating, or taking any other action against me with regard to this profile and the contents herein. The foregoing prohibitions also apply to your employee, agent, student or any personnel under your direction or control.

The contents of this profile are private and legally privileged and confidential information, and the violation of my personal privacy is punishable by law. UCC 1-103 1-308 ALL RIGHTS

One of whom gave this justification

For those of you who do not understand the reasoning behind this posting, Facebook is now a publicly traded entity. Unless you state otherwise, anyone can infringe on your right to privacy once you post to this site. It is recommended that you and other members post a similar notice as this, or you may copy and paste this version. If you do not po...st such a statement once, then you are indirectly allowing public use of items such as your photos and the information contained in your status updates.

I am not a lawyer, and have no understanding of these things.

My question is two fold, is this necessary? and even if it is necessary, will it have the desired effect?

I know it's similar to Do Facebook or its third-party partners use my photos in ads?, but maybe different because the game has changed now that FB is a public traded entity.

Answer 1

This question has already been addressed by:

• Snopes

[the claim is] erroneous, an expression of the mistaken belief that the use of some simple legal talisman — knowing enough to ask the right question or post a pertinent disclaimer — will immunize one from some undesirable legal consequence. The law just doesn't work that way.

[...]

the basic premise of this item is false: The fact that Facebook is now a publicly traded company (i.e., a company that has issued stocks which are traded on the open market) has nothing to do with privacy rights.

• Naked Security

Unfortunately taking control of your online identity is not as simple as making a declaration on your Facebook wall. Using any website to store content or personal details requires compliance with the site's Terms of Service.

These messages are simply another chain letter type hoax pinned upon wishful thinking.

Neither site offer rigorous legal references to support their point-of-view, but it seems to be pretty basic contract law.

• Slate

They got a response from Facebook along the same lines:

“We have noticed this recent status update that is being widely shared implying the ownership of your Facebook content has recently changed,” Alex Kirschner, a member of Facebook’s PR team, told me. “This is not true and has never been the case.”

They also point out that the two US statutes referenced (UCC 1-103 & 1-308) are "completely unrelated to privacy or social networking, making its inclusion irrelevant".