Honest question, what should they call it?
To me, it makes sense that they don't want to call it a missile unless it has a rocket or other type of powerful engine. Drones are things that I expect to have the ability to return to base, and to have a propeller engine, so if any of those is designed to not return then calling them kamikaze makes sense no?
Could be, but more likely it's just the result of having self hosted services, you have individuals exposing their own small servers to the wilderness of internet.
These trols also try constantly to post their crap to mainstream social media but they have it more difficult there. My guess is that they noticed lemmy is getting a big traction and has very poor media content control. Easy target.
Moderating media content is a difficult task and for sure centralized social media have better filters and actual humans in place to review content. Sadly, only big tech companies can pay for such infrastructure to moderate media content.
I don't see an easy way for federated servers to cope with this.