“There is no opt-in or opt-out on God’s Laws.”
That is not the discussion here. What is under discussion is whether or not registering with the government and declaring that one is a full time Yeshiva student violates Hashems law in some way. One Rosh Yeshiva maintains it does, numerous others do not. Those who follow the rosh Yeshiva who says it is, the follow up discussion HERE is, is the massive disturbance to every day life allowed, suggested or recommended under Hashems law as well? Again and again, people have asked, did the Rosh Yeshiva tell his talmidim to go out in the streets and cause mayhem?