More importantly tho', said publishers are probably not going to be too happy about someone infringing on their license, producing a potential competitive title (particularly since Star Trek games aren't particularly good in the first place). Mods of course are different, since they rely on a licensed product.
Not more importantly, as that was the point I then went on to make, but not as consisly as you. I was just saying that that was the reason Mods for liecenced Games dont get hasstle