To be private or not??

I feel as though I am a private person.  There are certain matters that I will not post about to the general public.  What is hard for me to believe is that people now a days post everything anything that goes on in their individual lives.  There is no mystery.  People are doing less face to face interaction, but rather blog about it.  Face to face interaction is hard to beat!!! Yes, people can blog about this and that from the comforts of their own home.  But, all I gotta say is the interaction is not the same.  People say and do things that are not acceptable in person while blogging or microblogging.  People please keep some things private.  Some things people do not want to know.  And yet it gets posted.