The problem isn't really the cheap and nasty £5 laser pointers - I doubt if they've got the range or power beyond 10ft or so.
It's this sort of stuff:
High power laser pointers. Green laser pointers with 50 mile range. Easily available, multiple online sources.
Who on earth needs an 800mW laser with a 50 mile range - I can't see any valid, non-trouble-causing reason. It would melt a hole in your average Powerpoint screen.
Last time I flew from Jo'burg (a couple of years ago, granted, so things might have changed) - the damn things were actually on sale at the airport.
