It actually doesn't matter what the reason is. There are people in sensitive situations, and there are people to whom privacy simply matters. It's my choice.
sure is your choice. let me ask, is someone holding a gun to your head making you use google? it's perfectly fine if you don't want to use google because of privacy reasons, but that's not what this thread is about is it?
there are some nuts here that refused to use g+ because of the shared data, but that has nothing to do with why it failed en masse.
every google-related thread gets co-opted with 10k posts about "well i don't use google because of blah blah privacy blah blah ads". it's a waste of bits.