Well I think its a bit too privacy invading, for example on registering a new google account they want your full name and then mobile number
To be honest, I'm just glad I don't live with these worries/paranoia. In this day and age, it can't be fun.
Are you really bothered about Google asking for your mobile number? You think they wouldn't just take it if they really wanted it? You are using a phone with a SIM card in it running on their software after all.
I trust you don't have a Facebook account? (There's someone that will sell you info to anyone...) How about security camera's? Do you have a credit card?
Anyway, we're probably going rather off topic. I don't mean to have a pop, generally I find it quite interesting that people can think that way is all.