Roger wrote:
The message
from "Clot" contains these words:

Sailing round offshore turbines could be fun.

Ahoy there small sailing vessel approaching down wind. This is the
anti-terrorist protection unit broadcasting on a frequency you won't
be listening to. We have you in our sights and if you don't turn
round and head up wind at least as fast as you are now travelling in
this direction we will blow you out of the water without further ado.
You have 20 seconds to comply with this message. :-)

Yikes - I'm gone!