Likely the purpose of the muh laz0rs is so the "theory" can be easily debunked with a 'where's your proofs?' If i see fires in patches following a straight line that parallels a road i tend to suspect arson.
When they say tracks they really mean manipulates.
First suspicion is a gas leak. An explosion of that magnitude would need a lot of gas. The trigger is a light switch or a refrigerator motor or something like that. i can imagine some tenderfoot smelling gas and going to the basement to check and flicking the light switch to the basement light and…
one person still missing.
The only thing likely to survive a global cataclysm or a great expanse of time is stone.
Someone should email that meme to Bill Gates.