Should we worry that the risk of omnicide is increased by the growth of movements like EA and longtermism that draw attention to the extent and prevalence of suffering and the desirability of its reduction?
One way of ending suffering would be to eliminate all life. If we convince more and more people of the problem of suffering, and the necessity to do something about it, do we also inadvertently increase the likelihood that some people will conclude that to end suffering we must end the world? With technological advances, it is possible that a very small number of actors would need to be convinced that this is a good idea for it to become a real risk over time.
The solution to the problem of suffering cannot be to eliminate all life because lifeless evolution created life once and it could recreate it, and million years of pain would come along again before another intelligent species like ours re-appear with technical power and has a chance to resolve the problem of suffering by controlling that phenomenon through conscious rational efforts until the end of this universe.
Million years of "state of nature" type pain is strongly preferable to s-risks.