I mean if they keep using methods we have no way of detecting then sure, why keep doing it? But if they’re capable of even knowing we’re here to even try to communicate with I’d have to guess that they’re also capable of telling what types of signals we could detect. We’ve never received any kind of signal that would make us think it wasn’t naturally occurring other than the “WOW” signal and even that turned out to not be aliens.
Fun fact: There have been at least two signals orders of magnitude stronger than the “wow” signal. I forgot the details, but IIRC, they’re both from different newer detectors made to look for dark matter.
I mean if they keep using methods we have no way of detecting then sure, why keep doing it? But if they’re capable of even knowing we’re here to even try to communicate with I’d have to guess that they’re also capable of telling what types of signals we could detect. We’ve never received any kind of signal that would make us think it wasn’t naturally occurring other than the “WOW” signal and even that turned out to not be aliens.
Fun fact: There have been at least two signals orders of magnitude stronger than the “wow” signal. I forgot the details, but IIRC, they’re both from different newer detectors made to look for dark matter.