Decrits' project is most likely NXT itself
Besides all proof salsa already posted there are also:
1) Double space after periods
2) Strong anti-communism/socialism feelings
Double space after periods was the standard way it is done on typewriters. So your 1) only "proves" that BCNext used a typewriter. Not that it actually proves anything. See, I just put two spaces after the period! And exclam. I have just proven I am BCNext
Let us use a bit of fuzzy math. I think typewriters were used 30 years ago, so if we assume that the two spaces is actual proof of typewriter usage and not a misdirection, we "know" BCNext is 45+ years old. Give or take some years.
I think people in the West during the cold war all had pretty strong anti-communist feelings, but this is again an age thing. Maybe you can put it into a more political active category, lets be bold and say the top 10%.
So you have now whittled down BCNext to somebody in the set of people older than 45 and in top 10% on the cold war feelings side. I think the set of these people is a bit larger than one person.
James