In the UK an outdoor laser show basically needs to notify the CAA 28 days in advance and they will issue a NOTAM to keep the planes away from you (You are also supposed to give the CAA a contact number so that if they need you to shut down they can call you).
This is subject to being more then certain distances from airfields and certain longer distances if within a few degrees of the runway centre lines, all in all, very sane.
That guy is a pillock, I mean an expanded beam IR laser in the 100W+ class? Yea NOT a cool toy, even if the beam quality is janky as fuck, only way to make the thing worse would be to use a Q switched source or mount the laser head on a drone....