We're you cutting screws just for the sake of it?
The only screw I've ever had a need to cut were machine screws, but maybe I'm missing out
Machine screws usually require a special cutter that doesn’t deform the diameter and the threads, unless the person cutting the machine screws feels like filing or grinding the end of the machine screw after cutting it.
There are plenty of other screw types, from wood screws, to deck screws, to drywall screws that might need to be cut down.
Cutting down screws because the only screws you have on hand are too long is not uncommon, and the same applies to nails,
Cutting down screws after installation, because you didn’t realize the screw/s were too long is also common.
Someone on the Philly Reddit section was complaining that their neighbor has a fence with numerous screws sticking out the back, probably because the fence was assembled by someone who bought or only had screws that where too long.
This is the type of thing where someone would need to either disassemble the fence, or go thru and cut every screw down screw down, and then hopefully go thru with sander or grinder to flatten the ends of the screws.
It would not surprise me if drywall screws were used, since drywall screws seem to be the quick go to general purpose screw nowadays, mainly due to the **** silly putty soft wood screws that tend to be readily available.