You should assume that anything you say in unencrypted form on Facebook, Reddit, email, etc. is being sucked into FBI/NSA databases.
"That any information about Swartz was collected during an Al Qaeda investigation—only to be retrieved nearly two years later for totally unrelated purposes—adds a familiar and sympathetic face to a controversial procedure in intelligence gathering commonly referred to as a “backdoor search.” That is, the FBI gathering information about Americans who are not accused of crimes, often without a warrant; storing that information in databases, sometimes for years; and later accessing it during the course of another investigation that ultimately has nothing to do with terrorism whatsoever. (Backdoor searches are most commonly associated with Section 702 of the FISA Amendments Act, an authority that was unavailable to the FBI at the time.)
While the substantive details of this terrorism investigation remain a mystery, legal experts who spoke to Gizmodo said they were alarmed—but not the least bit surprised—to hear the FBI used information gleaned in a terrorism case as it tried to build a criminal one against Swartz long after."
"That any information about Swartz was collected during an Al Qaeda investigation—only to be retrieved nearly two years later for totally unrelated purposes—adds a familiar and sympathetic face to a controversial procedure in intelligence gathering commonly referred to as a “backdoor search.” That is, the FBI gathering information about Americans who are not accused of crimes, often without a warrant; storing that information in databases, sometimes for years; and later accessing it during the course of another investigation that ultimately has nothing to do with terrorism whatsoever. (Backdoor searches are most commonly associated with Section 702 of the FISA Amendments Act, an authority that was unavailable to the FBI at the time.)
While the substantive details of this terrorism investigation remain a mystery, legal experts who spoke to Gizmodo said they were alarmed—but not the least bit surprised—to hear the FBI used information gleaned in a terrorism case as it tried to build a criminal one against Swartz long after."