That reference to the mind waves is only interesting in conjunction with the mind shield, which simply reduces probability of detection, but never reduces it to zero. So in essence, any base is always vulnerable, only to a different degree. An empty base with just a mind shield and radar is a good choice (cheap on building and maintaining, rebuilt within 34 days or so) but still, you can lose it anyways, especially if you don't have any troops there.
Has anybody ever tried defending such a set up? Let's say, a radar, a mind shield, living quarters and storage? If I remember it correctly, when the game runs out of spawn points for the aliens, it starts filling the human spawn points with them as well. As there is only the main elevator, I assume that will be a very likely outcome...