Jason B:
Well that may work but not in the context of the DIR system so if you are striving to be a DIR diver the answer is no, if you have no desire be DIR, then yes, that may work for you. You'll have to decide if the advantages outweigh the disadvantages.
I'd like to comment on this, possibly at the risk of undoing some of the "Good Karma" that I have (hopefully) tried to bring into this discussion.
The "image problem" of DIR typically comes from DIR divers who extrapolate from the belief that "DIR is the best system for me" to "DIR is the best system for everyone" to "DIR is the best system, period". More often than not, that comes across as arrogance and posturing, which only serves to turn people off.
I personally try and resist the temptation to do that, and ordinarily try to explain the system's advantages just based on its own merits. I've found that if I make statements that are interpreted as judgemental, then that puts people on the defensive, and as a result they are likely to shut down to any further discourse on the subject.
If I am pressed, however, then I will admit that I actually
do feel that DIR is the overall best system for most types of diving, and I would guess that most other DIR divers feel the same way. I therefore feel that it would be kind of hypocritical for me to tell someone "that may work for you" - almost like I am condoning their decision to do something that I feel is wrong. I try not to put myself in situations where I feel forced to do that, but sometimes it is hard to avoid.
The whole "DIR vs anti-DIR" thing is a lot like religion - I don't have to believe the same as you, and you don't have to believe the same as me. I am free to try and convince you that my way is "right", just as you are free to try and convince me that
your way is "right". However, there is no reason why we cannot each respect the other's decision to worship (or dive

) in a particular way. Ultimately it is an individual's choice on which way to go, and I will always try to respect another person's right to make that choice, even if I believe it is the wrong one (and as if things are not bad enough in this thread, now I have opened the possibility of a religious war

)
I recognize that not everyone will embrace the DIR philosophy as I have, and I believe that people are free to dive whatever way they feel like diving, and with whomever they wish to dive with. If I feel that a person is completely unsafe, then I always have the option of refusing to dive with them, just as they have the option of refusing to dive with me. I would not take offense at that, and would hope that they would not either.
In reality, I can almost always find an excuse to go diving with someone, even if they are not DIR. I'd just scale down the level of what I would be willing to do with a non-DIR diver. I'd probably be comfortable doing a shallow, warm water reef dive with almost anyone, but I'd pick my buddies very carefully for something more demanding such as a cave dive.
Ultimately, I believe that "leadership by example" is the way to go in this situation. People always seem to appreciate a high level of skill when they see it in the water, and they start asking questions, and then sometimes that gets them on the road to being better divers. Not everyone will go so far as becoming a GUE Rebreather diver (or even taking a Fundamentals course, for that matter), but if their diving (and enjoyment of diving) improves as a result of their interaction with me, well then sometimes maybe that will have to be enough.