I believe that many are. For example, I was on a boat in So Cal 2 weeks ago, it was a commercial trip that had about 30 divers on the trip. Many were solo lobster hunting, while other's were bragging about going to 165' on air, while yet some other's decided that diving without a BC is the manly thing to do. In short, this is a fairly representative sample of a typical open boat in So Cal. All of those idea's described above are ideas that I have rejected in the interest of increasing my safety margins. Moreover, I used to deep air, solo dive all the time so in essence I have used the "situation at hand" and learned from my previous mistakes. In my view, those ideas increase risk, increase stress and reduce safety and thus by extension reduce the amount of fun that I have diving, so why would I dive with any of those divers to learn from them?