Wow, no one uses them, and American divers that refuse to use them?! Stunning! Are these guys diving in a swimming pool?! Many places I have dove and many places all over the world, you could be gone, gone, gone with the currents. Riding around the skiffs with the boat guys looking for the rest of the divers quickly demonstrated how tiny heads dressed in black are. And the horns, which I also carry, are good but I wouldn't rely on them completely due to the wind, weather, people not paying attention, the motor running, etc.
I'd much rather carry the SMB than bob around for 36 hours in open ocean waiting to be found.
I'm with you... I have no desire to be bobbing up in down in the ocean while people are looking for me. I've spent a lot of time in open ocean and am very aware of just how tiny a person in the water is.
I don't know why this is such a problem in Belize. If you require them to have SMB's or they don't dive, then there isn't any problem. This was the policy in Guam when I dived there. From what I have seen or heard this is also the policy on most liveaboards as well no matter where you go in the world. In Guam like in many other places, though what you were paying for is a ride to the dive site and a briefing. You were buddy'd up on the boat.
In the Philippines and apparently in Belize, you generally have a guide with you. My experience in the Philippines is that the guides have them [SMB's]. Apparently this is not the case with most dive ops in Belize.
The key is education.... At least the knowledge of how important it is should be communicated during OW. Training should be given as soon as a diver is comfortable in the water and has gotten their buoyancy skills down. I wouldn't consider most people who goes straight into AOW after OW to be ready yet (always exceptions of course). If they're not paying attention they're going to find themselves on the surface!
As most of us know, the "average" scuba diver may not do more than a dozen dives a year, and those when they go on vacation. Even if they are more experienced than that, they may have had a long layoff, and we all know that skills deterioate when they aren't used.
A person who is not comfortable in the water is not ready for SMB deployment in my opinion. They can get themselves in trouble. Step at a time is the way to go IMHO. Having said that, I believe that it's a good idea that people who are going to participate in scuba diving on a regular basis should be striving towards improving their skills to become a better, safer diver.
Although I'm a big believer in everyone being responsible for themselves, I also recognize that not everyone is ready to move to the next step. I believe that being aware of the need, and finding out if you have a capable guide who is going to keep safety foremost, is information that would be good to know when choosing a dive operation.
As I said elsewhere in the thread though.... we don't have enough information to judge. What was her experience level? did she have a problem and have to surface quickly? We don't know. Let's not judge all dive ops (and divers) in the Philippines because of one accident that we don't have all the facts about.