You guys are going to have to get a bit more clued in to real life if you want to keep making software (eg. see what happens to open-source perl project that use camels in their logo). I like your work, I even think you should be able to use the name LDraw, but sitting around making bullshit, anti-factual arguments is not the way to go about using it. Your friend "Banbury" is particularly dangerous with his misinformation about trademark laws. The truth is not hard to find on google and should be read carefully.
"1) LEGO has a fair-play policy. If you clearly say it's not official, it won't matter. Plus, if they got lawyers, we could gladly change the name."
I can assure you they would do it if you used LEGO in the URL or project title. Because they have. Repeatedly.
"2) I don't understand about that, but don't you need an internationaly registered trademark to say if we can use a name or not?"
No. Trademark law is, for the most part, internationally compatible.
"3) If they sent lawyers, sure, we would change the name. But if it's open source and LDraw is open source, why can we not affiliate it with LDraw via the name?"
I'm not sure why James Jessiman's parents kept the trademark after he died, but I assume it was to stop people misusing it. The trademark on the name is a completely different issue to the open source nature of the LDraw language and parts. Stop conflating the two.
"4) We don't want to distribute the library. Our script is a plugin for Blender, not a stand-alone program. We have no need to distribute the library."
I'm not forcing you to do it.
Tim
"1) LEGO has a fair-play policy. If you clearly say it's not official, it won't matter. Plus, if they got lawyers, we could gladly change the name."
I can assure you they would do it if you used LEGO in the URL or project title. Because they have. Repeatedly.
"2) I don't understand about that, but don't you need an internationaly registered trademark to say if we can use a name or not?"
No. Trademark law is, for the most part, internationally compatible.
"3) If they sent lawyers, sure, we would change the name. But if it's open source and LDraw is open source, why can we not affiliate it with LDraw via the name?"
I'm not sure why James Jessiman's parents kept the trademark after he died, but I assume it was to stop people misusing it. The trademark on the name is a completely different issue to the open source nature of the LDraw language and parts. Stop conflating the two.
"4) We don't want to distribute the library. Our script is a plugin for Blender, not a stand-alone program. We have no need to distribute the library."
I'm not forcing you to do it.
Tim