LW is one of the few informal places which take existential risk seriously. Researchers can post here to describe proposed or ongoing research projects, seeking consultation on possible X-risk consequences of their work. Commenters should write their posts with the understanding that many researchers prioritize interest first and existential risk/social benefit of their work second, but that discussions of X-risk may steer researchers to projects with less X-risk/more social benefit.
I am working on an academic paper concerning how the Fermi paradox should influence our existential risk strategy. This LW post of mine contains some of the ideas I'm exploring.