The discussion isn't about people inflicting their convictions on people, it is about /how/ they express their convictions... respectfully like the 3D-Coat guy or offensively like the 3DU people. 

I will admit it... there are things I want that I will not buy solely because the vendor has expressed morally offensive (say anti-gay) views publicly. It does no good but there it is... I work from an emotional not a rational basis. There is a good reason IMO not to know the personal views of certain actors, artists, content producers etc.

The 3DU thing isn't an outrage or an insult to me but it puts them squarely on the weeny list for me. My complaint with them is not that they are judging me (what do I care about that) but that they are being whiny and petulant... very bad form I say!

If they had simple asked in a polite way that I not use their product in renders that depict genitals I could/would respect that. The 3D-Coat guy told me his story and perspective and asked me to follow my conscience in being thoughtful toward everyone and also toward his feelings in the matter. Given the tone of his request I would have honored it even without the back story or any details.