When I called the Oakland FSS today for a preflight briefing and asked about TFRs in the area I received probably the best explanation so far of what the blanket National Security NOTAM meant in practice: "Just the usual one that's been in place for a while, you know, don't be makin' pylon turns around the Golden Gate bridge..."
This is a companion discussion topic for the original entry at https://www.avweb.com/features/shortfinal/short-final-717