lockdown just means that the ecology of the soil jives with the ecology of the mite. When it doesn't, you have an outbreak . You said "bugproof".
Seems to me that when the soil ecology jives with the ecology of the mite, you will have outbreaks. What you want is a soil that DOES NOT jive with the ecology of the mite...then you have a means of resistance. Even so, nasties like mites are still going to be able to attack your "locked down soil" plants, they just won't be as likely to cause severe devastation.
Since this thread has taken a turn towards the dark side...I'd ask you to consider providing some real and applicable information on what you term "lock down". I notice you've mentioned it several times, but I have yet to see any practical information on how one achieves this Alcatraz soil, as it were.
I am slowly catching up on the living soil thread and I can say with fair assurance that Gas, Coot, BJW, et. al. know what they are typing about. In the sense of providing a very conducive soil for plant health...and in dealing with the predators that are likely to be a nuisance during a growing cycle. They do this with real world proofs...something I've yet to see you provide.
I'm all eyes for anything you can contribute...Best.