Will, your example, good or bad, is universal over singletons, nonsingletons, any way of doing things anywhere.

My point was not that non-singletons can see it coming. But if one non-singletons trys self-modification in a certain way and it doesn't work out then other non-singletons can learn from the mistake (or in worst the evolutionary case the descendents of people curious in a certain way would be out competed by those that instinctively didn't try the dangerous activity). Less so with the physics experiments, depending on dispersal of non-singletons, range of the physical destruction.