I'm curious about this talk show malarky. A columnist in an English newspaper certainly had a few things to say a couple of weeks back. Any more on evidence that it was pre-planned ?
Diver magazine has a lot more information than Clarksons column. Their website is down atm and im not going to type it out from the magazine for copyright reasons etc.
EDIT:- Just realised the komodo dragon incident is not faked. The 2 missing from an Australian boat around a similar time is believed to have been deliberate. 2 separate incidents.
Anyway:
.. I have only a yellow one so that's what I use and here there is no concern with using it on a regular recreational dive
Always brief with the skipper, here and in a lot of other places in the world a yellow DSMB is accepted as the "im in trouble/i need gas" emergency bag so if you are going to use one then tell the skipper AND other divers onboard or else you'll find a drop tank and pissed off skipper when you surface.
I can think of a few people in trouble at a local quarry for sending up yellow without telling anyone and mobilising all the rescue personnel there because they forgot to tell anyone.
As a note its always worth briefing and discussing signalling equipment with the boat skipper before diving so he knows what to expect, you know what to expect and there's no confusion in the event of an incident.