There was a BBC story about the devices, and they do exist, doing coarse frequency spectroscopy and time series analysis. Even if the scrotes don't believe they exist, are they willing to take the chance?
Having tried to post the links, there's now a question whether the automatic a-to-at-symbol conversion machine will let these links work.
BBC NEWS | Technology | Police fight back on laser threat
SPIE | Proceeding | Laser event recorder
www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA507278
and then upscale:
http://www.google.co.uk/url?sa=t&rct...55123115,d.d2k