That’s weird, but I love it for that reason, I never thought of doing that. But what happens when they thaw?
Well I freeze them because it’s a semi-humane chemical-free way of killing them, and also because it makes pinning them easier later on. Their systems just slow down when their body temperatures drop, and eventually they die. They freeze solid, but stay “moist”. Anyone who has tried to spread an insect that died and stiffened at room temperature before knows that it’s pretty much impossible, you’ll break the insect apart unless you put it in a warm damp/humid box for several hours or even a couple days to make it re-hydrated and pliable. When I thaw my frozen bugs, I just let them sit out for a little while at room temperature to defrost, and then they are just as pliable as if they were freshly dead.
I hope that makes sense/helps, let me know if you have any more questions! :D