Around the turn of the century, it seemed fashionable for porn films to play on real movie titles, such as:
Forest Hump
Saving Ryan's Privates
and 2001: A Sex Odyssey
For a moment, there, I had presumed that the "TNG porno" of which you speak fell in line with this trend. You can well imagine my surprise to find out that no, they had indeed made every effort to reproduce the TNG environment, on a limited budget and used that environment to spice up the pornography scenes. None of this overly concerned me, but what did raise an eyebrow was their attempt to present this as a Fan Film by removing the pornography. It was a bold move ... but in the end, proved itself to be absolutely tasteless and vulgar. Is nothing scared to those devils?