Uh oh
There was that Star Trek Voyager episode where an early insterstellar
probe from Earth spewed radiation on an unsuspecting alien civilization
and nearly wiped them out.
And we've got two Pioneers, two Voyagers, and one New Horizons on
their way into the galaxy. Plus their final rocket stages.
BTW, real experts say the probes will last at least 1 billion years in the
interstellar realm, and that is a conservative estimate.