Like the article says, satellite messages can be traced while radio is broadcast to everyone so it's impossible to find out who's listening. Shortwave radios are also cheap and widespread, so it's easy to get one anywhere in the world and if your house gets searched, it won't be suspicious if you have one.
Satellite unicast receivers also can't be located. Iridium pagers were (maybe still are?) a thing, for example.
However, carrying one of these is probably highly suspicious compared to a world band radio receiver.
> Like the article says, satellite messages can be traced while radio is broadcast to everyone
I don't buy it.
Satellite downlinks are broadcast to everyone under a potentially massive footprint. Take a look at the footprint for QO-100 which you could use with very inexpensive equipment that looks pretty much like a normal satellite TV dish.
https://jeremyclark.ca/wp/telecom/sdr-for-qo-100-satellite-r...
> Shortwave radios are also cheap and widespread, so it's easy to get one anywhere in the world
I always hear this in discussions about number stations, but I don't think this is true in the US. In fact, I don't think I've ever seen a general consumer "shortwave radio". Unless the regular AM band counts, which seems to be medium wave.