1 point
the capability to transit intergalactic distances in an amount of time that would make them a threat to us
I would say that amount of time is anything less than the remaining lifespan of the universe, if we are in this for the long haul. Even with the speed of light as the limit, it’s still something to worry about that we could build a thriving civilization for 20 million years which then is wiped out because that’s how long it took for them to get here after they saw us and we were doomed from the beginning.
