Yes, civil-liberties advocates have been on this particular horse since before the term "libertarian" even came into widespread usage. Various kinds of attempts

Yes, civil-liberties advocates have been on this particular horse since before the term "libertarian" even came into widespread usage. Various kinds of attempts at dragnet surveillance, at various scales, have been an active issue of controversy going back decades (e.g. in the McCarthyist era), and civil-liberties groups like the ACLU have been pretty consistent in opposition.