I rarely consider anything "too far" unless you're doing something totally ineffective or duplicating effort, and not talking about redundancy. I think most people who say this are either the people who we need to be secure from or people who are ignorant to the threats. I'm not saying the same threats affect us all, but there's always a possibility you could become a target through whistleblowing, protest, being attractive, pissing off a random stranger, etc. And usually by the time you are a target, it's too late. Your information is already out there and it's difficult to stop broadcasting more with all of the tracking systems in place all over.

It's often not clinical paranoia that causes people to worry about security and/or privacy, primarily it's a desire for a minimal amount of privacy, hiding from predators, and/or basic protection from fascist regimes of various strengths that have taken over most governments. Often keeping a little privacy also is the best way to prevent becoming a target in the first place.