I just re-read Gackenbach's article (thanks for the link) and I think, Dreamdov, that this is not something to be concerned about. Gackenbach wrote the article at a time when she and LaBerge were recognizing the potential power of LD'ing as a tool, and I'm guessing that she felt some cautionary words might be necessary. Since then, I think time has proven that LD'ing is essentially harmless, since it's "power" can only be maximized by those with a very healthy psyche and sense of self. The article also shows why LaBerge adamantly says that RC's must be done by asking, "Is this a dream?". And not "Is this real?"

And, for what it's worth, I've met quite a few very advanced LD'ers over the years, and to a person they are the brightest, calmest, most mentally sound people I've come across.

So don't be concerned; LD'ing is more likely to help than harm your mental health...