I read the article and I took it with a grain of salt. As I saterized in the anti-vaccine thread, but it went over people. The Internet (and Tzniut) have become the whipping boy for every social ill in the frum community. Someone got a cold and the internet is blamed. Someone got a parking ticket, It was because of Tzniut.
People have been going OTD for centuries and there wasnt an internet whipping boy for it. The Haskallah was not founded on the internet.
People leave religion because they are disastified with it, that disastification can come from perceived corruption (sometime real unfortunatly) because they dont see it having meaning in their life to frankly too much of it and seeing falsehoods in it and inconsistancies.
People who are happy and fulfilled in the frum community are not going to the internet. The people going are those are who have grieveces of some sort and looking to validate those grievences and find like minded people.
In this case it might be sunglasses or a hat, but those things can snowball into bigger issues., The person find out the hat or sunglasses is just a chumra or Hashkafa and then discovers other things are also chumras or hashkafa and the who system collapses. He then goes to the internet and finds people who the same thing happend and then eventually goes OTD. Was this really the internets fault?