Posthuman Blues

From my new SETI post:

Lest my concerns seem like so much "X-Files" paranoia, it's worth considering some of the reasons an ET intelligence might send us a message in the first place. Perhaps, as noted, we're due to experience an unforeseen "existential threat" via gamma radiation or the close approach of an uncharted black hole. Or we may be in the line of fire of someone else's war. More extravagantly, we might discover that our section of the galaxy is scheduled for demolition in order to make room for an astro-engineering project -- in which case our stellar landlords could be sending out a most unwelcome eviction notice (albeit one we can postpone heeding for a few thousand years).