The temporary airport at Burning Man....
After the permanent injury of a staff member last year at the Burning Man event, all handheld lasers have been banned; additionally, no lasers on mobile art pieces. The folks who run the temporary airport there (the event takes place on a giant dry lake bed @ around 3800' ASL) expressed a lot of relief. It's virtually impossible to nab someone who is playing with these devices at the event, but hopefully the message about the ban gets out to folks and there's less screwing around with these dangerous toys.