we all should be worried about such details as it is the basic mean for "us" to validate to the world who "we" exist and for the world to confirm this information we have provided that we are us, these information might not seem very sensitive but imagine a world where someone purposely "erased" your name, address, phone number history, etc. how could you prove your name is "X" when "X" does not even exist? how could you show you leaved at "X" when there is no information show you leaving at "X"? et cetera...?