Don't know if any of the other UK users watched James May's Toy Stories - 10 miles Model Train Record Attempt but if you did then towards the end you might have noticed that some prick with a laser pointer shone it at May and his accomplicies whilst they were filming.
I've got a screen capture from the programme from Youtube:
Luckily it looks very low powered, which considering UK law Limits them to 1mw, probably means it was below any possible damage level.