but as a call for some SM divers to perhaps dial down their strident advocacy
I believe I was the "last straw" regarding this thread. I responded to a " greetings " thread from a fellow member here in Alberta Canada. Yea, practically Meca for divers.
He had stated he was getting back into diving and had to buy new equipment.
And yes, after saying hi to a neighbor I asked if he had seen sidemount. I hadn't and therefore had to buy more gear and reconfigure what I had. I did not go on about it and I would never knock anybody's INFORMED decision. I'm guessing the problem being discussed has less to do with content and more to do with attitude. Experience breeds knowledge not authority. People get excited about new experiences and a few get very cocky when they think they have alot of experience. The subject doesn't matter. Try to consider the source before judging the content. Knowledge can be very valuable if you spend it in a positive manner.
Cheers, Kevin