Controversy: Facebook Group "People who DON'T clap between movements"

The group "People who DON'T clap between movements" has over 35000 members, including some of my friends, and I find it disturbingly pretentious...

Any composer before the twentieth-century would have been offended had there not been clapping in between movements. Mozart wrote of his delight when audiences would clap during passages in his "Paris" symphony K297 -- while the symphony was still playing! Brahms complained when people didn't clap enough between movements at the premiere of his first piano concerto. Even in the twentieth-century, at the American premiere of a Shostakovich symphony by the Chicago Symphony, an old man stood up and yelled "Bravo" after the first movement, while people glared at him-- it was Shostakovich himself.The idea of silence is an oddly modern construct, while the opera, ballet, jazz, etc. have not taken on this performance practice. The megalomanic conductors of the early twentieth-century gave rise to this audience control and I must say it feels unnatural to perform the end of the first movement of Sibelius concerto with such a big flourish to a silent audience response.

So my question is, is there anything wrong with listeners expressing their uncontrollable awe of your playing? Have audiences become so passive and unopinionated that they only clap when they know they are supposed to?