MacYoung is often right but that doesn't mean he should be a Primary Source for those of us interested in self defense. I think I benefited in my early 20s from reading some of his work - it DOES do a decent job of dispelling some silly fantasies. In that sense I think it does a pretty good job at penetrating the testosterone fog and keeping guys from doing something stupid.
However I have noticed a trend in MacYoung's work, THR, and elsewhere, where "legal advice" (from non-lawyers, at that) supplants tactical advice. The two are separate. Sound tactics by definition are as well within the law as possible, but simply being within the law is not a guarantee of sound tactics. Trying to frighten the crap out of people with legal hypotheticals does not make them sound tacticians, and in fact can do the opposite.
I have discovered through personal experience that rather than dwell in the eventualities of legal morasses, it's best to fill that void with some real, genuine, quality tactical training, that puts you on the right side of the law. If you do that there is very little need, past knowing your state's laws, to play armchair lawyer.
No offense is intended to those who have a genuine passion for the legal side of self-defense; however, I DO put forth that it consumes some people's thoughts to the extent that they feel "legal actions" and "good tactics" are synonymous. Witness the number of threads (video or news story analysis) that get replies about the legality, lack of legality, jury-friendliness, etc, of a shooting or self-defense scenario. These often outnumber replies focusing on survival tactics.
If we are to entertain the anecdotes of some police officers, the fact that a shooting (as an officer) can = career suicide can make it harder to act decisively in a lethal force scenario, because the cognitive machinery is burdened with worry. I find this plausible, and think that reading too much of MacYoung's website (oddly, the book of his I have, Street E&E, isn't much like this at all) could have the same effect.