Temperature extremes are not good ideas for your computer. Below zero is not safe in my opinion, and I wouldn't try it. That said, I have left my work laptop in my car over a winter weekend many times with no ill effects. I live in Maryland and the temps are usually only around 20°F or in the teens during the worst winter bouts. I looked up your solution for the bugs with freezing temps, and the recommendation is zero degrees for multiple days. Personally, I would be uncomfortable with that. I'd prefer to seal up the machine in a bag for whatever period it takes to starve the little *******s.
If you do choose to leave it in the cold for an extended period, and everything comes into equilibrium at the low temp, be most careful about not warming it up quickly or turning it on right away while it's cold. Warm it up to room temperature like you do when you thaw out a turkey (except obviously don't submerge it in water, lol). Warming up too quickly can unfortunately be a good way to damage components or the screen. And if you warm it up (especially quickly) in a space with high humidity you're just asking for condensation on internal parts. Water drops forming on your internal computer parts will obviously do some serious potential damage.
Sidebar.......sorry this is a bit off-topic but you can now relate. I once got tobacco beetles in my humidor from a cigar I bought on vacation and brought back. I had about 70 cigars in there, and they got infested before I knew I had the beetles. So freezing is one of the cures for them too. I took out all the cigars from the humidor and froze the cigars and the humidor for several days to kill the bugs. Lost about 75% of my cigars, saved the rest, but the freezing did actually work on the bugs!
🙂
Davemon50