It is for now. We will get to a point where a negative utilitarian with accesses to genome synthesis technology will be able to kill tens of millions. And this seems like it could become pretty feasible, even from a basement.
We would need to consider, however, access to finished products (like trained models). In some cases in the future, having access to the appropriate model might be as dangerous as handing someone a nuke.
How hard would it be for someone to assemble a indiscriminate "killer drone," given the appropriate image recognition and flight control models?
My background is an engineering role in the military and my current path is CS. I don't think it's unfeasible that an individual could build a crude drone that would kill a single person. Building an entire swarm of death robots is a different story.
We got treaties on nuclear and chemical weapons. It could happen for autonomous weapons and weaponized intelligent agents also. But it might require a serious case of abuse before we get there, as it did for chemical and nuclear...