Everyone calls me crazy for trying to develop a no mount system for cave diving, but I'm still doing it. I suppose those of us who realize we are accountable to ourselves and our family are the ones who choose to do things outside of the main stream. And no, I don't carry a pony bottle while diving. Doubles are my usual fare, and if no/side mounting, there are plenty of bottles to be had. The pony bottle gets handed to students for deep/intro tech dives and it sits in the truck to fill tires. I loan it out quite often for those who request it.
On the other hand, should you screw up and die the rest of us are here to take the heat for your mistake. Remember that as well. I consider the repercussions of my actions before I undertake any action that might screw it up for someone else. It only takes one idiot to close a dive site, one idiot for the lawmakers to outlaw something I love to do. Don't be that idiot!
If there's an inherent risk of screwing it up for someone else, plan accordingly. Otherwise we will be discussing your demise out in the general area, where the trolls lie. The discussion will quickly turn into solo bashing, and the rest of us will have a tarnished reputation due to the solo diver who didn't plan properly. You'll be dead so it won't affect you, but the rest of us will just shake our heads and use you as a pariah of what not to do during a solo dive. We might even name a "Solo Divers Guide to Survival" in your honor and tell your tale for generations to come. Or not.