wasting police time, contempt of court, etc.

[Adam Atkinson (ETL)]

> >And can I "waste police time" by e.g. walking around
> >in a balaclava marking the locations of CCTV cameras on a map
> >of my town, including [Shining Path] tempting words in my
> >emails etc.?
> >
> 
> Not sure about walking around counting CCTV cameras, but 
> triggering the
> suspicious words filter could easily be regarded as wasting police (or
> GCHQ) time. Not unlike hoax 999 calls, I would have thought.

Really? Including suspicious words in emails to my friends could
get me done for wasting police or GCHQ time? I don't want to believe
this is realistic.