You may add 2 more questions in your FAQ section:

Q: Why do I get the "The last posting from your IP was less than 360 seconds ago." error when I haven't posted today?
A: Logging in, searching, sending PM will also be counted as posting.


Q: How to get rid of the 360 seconds posting limit?
A: The limit will be lowered to 75 seconds when you have 15 activity. https://bitcointalk.org/index.php?topic=237597.msg4131557#msg4131557