A recent article I stumbled across reveals exactly what your favorite law enforcement officials receive when they send a subpoena to Facebook.
It is very important to know exactly what law enforcement is capable of and this is nothing short of shocking. Everything from images to groups and every single post you write is available in pdf format.
This is exactly why it is important to practice security culture and be careful of what you say and to whom you say it to. Don’t be afraid of the government or it’s many tendrils of oppression, just know what is within your limits of being safe.