Though it's ironic how people don't mind someone at Facebook seeing their page because those people remain faceless.
How is that ironic?
If we're going to have things like Facebook, we just have to accept that the people behind it can access your data - just like the phone company can access your phone records, the bank can access your bank records, the library can access your library records, etc. It's something we have to accept to do business with these businesses.
But just because we have to trust our bank doesn't mean it's ironic if we don't trust others with our bank details. Just because we have to trust our phone company with our phone records, it doesn't make it ironic that we don't hand out our phone records to anyone who asks. I'm flabbergasted that you don't understand this, and try to make that point over and over again.