> Other techniques are human-attended. Remote drones are very appealing as we've seen for most of a decade now. Anybody can afford them; its anonymous; it comes from above so is hard to anticipate.
How is a drone swarm not human-attended in a way that is distinct from existing drone weapon systems? More specifically, what advantages does a drone swarm have over existing drone weapon systems?
I still think you're missing the reason why this is a non-starter. It's not that they're ineffective (although I'd argue that they are of limited effectiveness), it's that there are too many better alternatives.
> Anybody can afford them; its anonymous; it comes from above so is hard to anticipate.
Russian 50mm mortars are inexpensive and readily available on the arms market. You can drag it through mud, drop it, and shoot it with small arms, and it will still work.
It's anonymous, because the high trajectory allows you to fire from an enclosed position, then simply walk away when you're done; remember they're cheap and available.
When you fire a mortar, it travels a long distance and comes from above, so it's hard to anticipate.
Guerilla forces love mortars. They use them all the time. They get the job done.
The SciFi-fantasty drone swarm is far too cumbersome and expensive for guerrilla forces, and it's too much of a blunt instrument for 1st-world powers.
First-world powers don't need kamikaze drones, because they can field larger, more sophisticated drones that are mounted with more advanced sensors and traditional munitions. They can fire on many targets in succession with terribly effective weaponry like a 20mm cannon. They can fire from altitude where you don't even see them. They can fly in-theater, autonomously until the time that they're needed. They can return to base, be reloaded with cheap ammunition, then return to the theater of operation.
There are some very limited scenarios where the weapon system you're proposing makes sense, but it's a tiny niche. There are too many simpler, effective options to acheive the same result. The only thing this concept has going for it is the cool factor, which doesn't count for much.