Take a look at this site that is dedicated to this strange phenomenon and others, and how they affect a TV series.
(It's named after the precise moment in Happy Days when it is universally accepted that the series was never good again - when he "jumped the shark.")

http://www.jumptheshark.com/

This device is not for protection from normal visible-light CCTV cameras, most of which have infrared filters installed, but only for infrared cameras, which I think are relatively rare.

@ 50:

"It seems that Lennon Murphy told Yoko that she intended to go by "Lennon", Yoko said that sounded fine"

No. This is NOT the issue; people are still NOT reading Yoko's statement properly.
The correct statement is that Lennon Murphy told Yoko that she intended to go by "Lennon Murphy" and Yoko was okay with that.
It appears the issues arose when LM started going by "Lennon."

After reading this a few times, I think what actually might be happening here is that Yoko IS in fact pursuing some course of legal action (perhaps not a law suit specifically) against usage of the name "Lennon" by itself. She claims that she is not attempting to stop LM from using the name "Lennon Murphy" but she does NOT claim ANYWHERE that she isn't attempting to stop LM from using the name "Lennon" - quite the opposite in fact.
Basically all the letter does is expel the notion of LM being sued - my guess is that perhaps LM did in fact get a "cease and desist" or similar legal letter from Yoko and may have (too hastily) interpreted it as a law suit, but it really does appear that some sort of legal proceedings are being taken on exactly the original issue that seemed upsetting in the original post.

This is admittedly some conjecture on my part, but seriously folks, I think we all might be skimming over Yoko's letter here way too quickly.

Actually, upon further investigation, it appears as though LM probably already owns the trademark for the name "Lennon" and that Yoko is attempting to take it away.
Is John Lennon ever marketed as only "Lennon?" If not, I'm not sure I see the trouble.

Is there any possibility we are mis-reading Yoko's statement? While it sounds like LM is applying for a sort of "sole usage" trademark on Lennon (sorry, I'm no lawyer so my terminology here is probably ridiculous), could is be possible that what is actually happening is that LM is simply attempting to get permission to use the name "Lennon" by itself (ie without saying her full name "Lennon Murphy") in performances and sales? In which case it might still be a publicity stunt, or it might just be that she really likes her first name by itself.