I would not want to live in a society that can "stamp out" or otherwise eradicate Scientology. Or any other thing that some people enjoy, that someone else decides is bad or evil, like smoking or cheeseburgers or guns or any Belief System, no matter how full of shit it is.
As adults in a free society, we need the freedom to decide. (Children are another matter, and do need protection, but that's what parents are for.)
So while it is fine and just an exercise in free speech to stand outside an org with a sign that says "Scientology is a scam" or "David Miscavige is an SP", it is NOT OK to stand in front of the door and physically keep people from going in, or run around and burn down their buildings because you "know what is best" and want to save everyone. Too much like the Scientologist who runs around manipulating and lying to people because they want to save them or "knows best that they just really need Scientology."
Educating people, protests, articles, books, programs.....great.
Enforcement, eradication, "stamping out".... those are tools of a totalitarian "Big Brother Knows Best" type society that I do not support.