How far should privacy go?

These days, 'privacy' is the big word in discussions. There are lots of action groups who defend the right to privacy.

I.m.o. privacy is over-rated. A few examples:

The Belgian State sues Facebook because this company uses private information to sell to third parties. Honestly! If you use Facebook, you should be aware of the fact that all things you put on it will be viewed - and used - by others. If you don't want that, just don't use Facebook or see to it you don't put private information on it. Same goes for all social networks.

Belgian police also has no more right to check phone calls and emails of criminals - in the name of privacy! Before that, the law said that phone companies should keep record of all traffic, and these dates could be asked by the police.  Do criminals have a right to privacy? I should think not!

Also, if you are on TV or in films, or a best-selling singer, you should be aware that you can't do anything you want anymore when you appear in public.The price of fame!

And so I could continue for a while, but I'm sure you get my drift.  I was always taught that when you want to keep something private, you don't share it with anyone. Right???