@Simon Hello, I understand where you're coming from, but as @legolijntje pointed out, there is no (according to mine and his research) existing trademark on that term. LEGO is putting the trademarks wherever possible, likely because they really want to avoid a misstep in that. Hence, I thin, a lot of their TM marks are unnecessary, but present.
I completely understand the approach of being safe rather than sorry, but I would like you to re-visit this issue and maybe look more into what actually is or isn't required. I would not mind a mandatory inclusion of the TM symbol within the names that are potentially sensitive, but rejecting the terms on the whole seems excessive. All it will cause is people having to cripple the words, and we will end up with multitude of 'StarDestroyers', 'Star Destoyers' e.t.c... Seems unfortunate to me