Around here, humans using AI to do bad things is referred to as "misuse risks", whereas "misaligned AI" is used exclusively to refer to the AI being the primary agent. There are many thought experiments where the AI convinces humans to do things which result in bad outcomes. "Execute this plan for me, human, but don't look at the details too hard please." This is still considered a case of misaligned AI.
If you break it down analytically, there needs to be two elements for bad things to happen: the will to do so and the power to do so. As Daniel notes, some humans have already had the power to do so for many decades, but fortunately none have had the will. AI is expected to be extremely powerful too, and AI will have its own will (including a will to power), so both misaligned AI and misuse risks are things to take seriously.
Is it possible that the AI risk from the emergence of a very powerful AI is not as likely since before that occurs some human with a less powerful AI ends the world first, or at least destroys modern human civilization and we're back to the stone age hunter gathering world before the AI gets powerful enough do do that for/to us?
It's definitely a possibility I and other people have thought about. My view is that takeoff will be fast enough that this outcome is unlikely; most humans don't want to destroy civilization and so before one of the exceptions gets their hands on AI powerful enough to destroy civilization when used deliberately for that purpose by humans, someone else will have their hands on AI that is even more powerful, powerful enough to destroy civilization 'on its own.'
Consider: Nukes and bio weapons can destroy the world already, but for decades the world has persisted, because none of the hundred or so actors capable of destroying the world have wanted to do so. Really I'm not relying on a fast takeoff assumption here, more like a not-multi-decade-long takeoff assumption.
I am not up on much of the AI risk discussion but for this outsider most of the focus seems on the AI taking actions.
I recall someone (here I think) posting a comment about how a bio research AI initiative seeking to find beneficial things was asked if the tools could be used to find harmful things. They changed their search and apparently found a number of really bad things really quickly.
Does anyone look at, have concerns or estimates on risk in this area? Is it possible that the AI risk from the emergence of a very powerful AI is not as likely since before that occurs some human with a less powerful AI ends the world first, or at least destroys modern human civilization and we're back to the stone age hunter gathering world before the AI gets powerful enough do do that for/to us?