Sad turn of events indeed.
I have been to Caernarfon myself - a great place with beautiful scenery. When I heard of the incident, we (me/friends at Barton) immediately thought he must have hit (or missed and crashed) due to the wind turbines recently installed on the airfield.
Some people I know who are skeptical of GA are already saying - "Told you so" / "Maverick pilots" etc. etc. The media does not help - with the Great British Tabloids saying that GA is dangerous, environmentally unfriendly (
Sun talking about the environment 
) and a non-sport for the elite.
These things do happen, but it seems like while driving like a Maniac with cellphone in one hand is "cool", GA is a danger to the society
Anyway, my best wishes for the survivors, and their families. I hope the youngest one is not put off by this horrible incident.