I've been cubing since January, and I'm just starting to know the workings of the cubing community so my opinion might not count to many. Nevertheles here comes the wall of text:
I struggle to find people who actually enjoy cubing, and not just learn to solve it and then loose interest. So far I've teached about 7 people how to solve it, and only ones shows interest in becoming serious in speedcubing. Besides these, I've met 3 people who can solve it and they are all happy with just been able to do so. I'm not a good cuber at all (30" PB), and part of it is that there isn't much motivation in spending 7 months playing with a plastic toy on your own alone at home. A larger community would mean more cubers, and I'm up for that.
As a comparison take rollerblading. I started rollerblading in 1995, during the initial blading boom and watched as the sport grew excesivelly large, then collapsed on its own premature success. Over the years, our local skating community fell from thousands to eventually a dozen skaters and during the past 10 years, I tried to keep the sport alive in our country by bringing new people in and warning old friends that if we didn't drop the "exclusive group" mentallity, our sport would die. Sure, lots of the newbies I brought to the group where #$@#, but for every 5 that where not serious like us, one shinned and became great. Spending a decade skating with the same people becomes a little monotonous and after I was forced to quit due to permanent ankle injury 2years ago, the group slowly fell appart and serious rollerblading is now dead in our country.
I'm just saying, right now most of the old cubers might hate the influx of newbies that are not in synch with the community's way of being, but just as cubing faded during the 90s the current boom will too come to an end and the growing trend will stop. The more people get hooked now, the more will continue to cube 10 years from now and trust me, you'll wish everyone would have been more open now.
... or maybe I'm just a newbie... and my opinion is even more irrelevant since I'm just bitter because I have no one to cube with..
..who knows.