As an aside, it’s far too late to stop broadcasts. The marginal risk of discovery imposed by any action today is pretty much zero—we’ve been sending LOTS of EM outward in all directions for many many decades, and there’s no way to recall any of it.
Thankfully aside from military radar, which is highly directional and sporadic, the rest is lost in the background noise after a few dozen lightyears.
Thankfully aside from military radar, which is highly directional and sporadic, the rest is lost in the background noise after a few dozen lightyears.