A drone is just a bunch of plastic parts, a motor, radio transmitter, simple circuit board ESCs, camera and some wires.

An entire diy drone project could be produced. The complex parts could also be homemade but require more than a 3d printer. They're all parts you can get for over the counter cash from hobby shops though. What's missing is someone actually putting together the kind of online project guide for it as a genuine tool. There are build your own fpv drone guides but not a "build your own fpv suicide drone" guides.

The biggest benefit of going this route is cost over the pre-made alternatives, bringing it right down to parts cost would enable people to use it in all kinds of ways.