You are attacking a straw man argument. The problem lies not with registration, but with purposeful degradation of content a la expertsexchange, for the purpose of _forcing_ registration just for viewing. I'm _not_ interested in registering into every walled garden out there on the Internet, just for the purpose of reading a result of a web search.

(All right all right, you can do the "but it's technically not content cloaking" quora astroturf dance now; but you know the saying: if it walks like duck, swims like a duck, and quacks like a duck...)