I have been on facebook for years now and wouldn't be without it, you can keep it as secure as you want to, mine is just family and friends, if you read the rules and checkout what you need to do for privacy (many don't) there shouldn't be a problem.
Honestly I can't think that info on my FB is of any use other then to the people I want to see it. It is not set for the Public Domain.
You can set your browser ie. google to not target you and I have eg adverts.
To be honest it tracking me would not bother me I have nothing to hide and I am only one of millions in the world using facebook.
Forgot to say you can set it so that only you can see your info and no one else, so if anyone visits your home page they can't see it.