Yeah, back in the old "Greenspun" days, this was just a CB750 site, and I think we had a much better class of forum member back then, but due to the whining of a few owners of lesser (capacity) SOHC4's, Glenn opened the doors to all comers, and just like iraq after it was "Liberated", I don't always think it's a better place now.............. 
As usual Mate you articulated some of the problem clearly. It became a tourist attraction. Smaller bikes may not be the actual problem, it is the number of people. A certain percentage of any population are #$%*s. The larger the group, the larger the number of #$%*s. This Community of ours has been pretty good at policing itself and seems to continue to do so.
Like any Community the Greenspun population aged and gave up riding, so they drifted away. I think if the newer members maintain some of that culture - which they can, we will be OK.
Unlike the "Greenspun" days there was no CMSL, David Silver etc, you made do with what you had, and traded with others.