I believe from what I have read and heard, that all E-mail is scanned for key words in the same way that telephone calls are monitored.
How truthful this is...only the people in the know would really know!!!! If key words set off some chain of events, where anyone who uses them draws attention to themselves, then it must be like a ticking TIME_BOMB!!!!!. We are all under suspicion....Big Brother is watching YOU!!! OHHHHHH and ME!! Be Blessed.