Heh, I understand. I heard one infamous story about someone who tried to put a Chakat (I am not going to explain what that is, look it up yourselves) in a Warhammer 40K campaign.
Now I am not a fan of WH40k as find its level of grimdarkness sometimes cartoonishly bad (face it, in general almost everything sucks, there is no hope, and oblivion might actually be a good thing), but when someone on a video told me about how this all started I was immediately like "Oh yeez, I know where this is heading, You idiot (to the guy who is the focus ridicule in this story), you should not have done this. The moment you even conceived of this idea alarm bells should have rung in your head while the voice of reason said: No, this does not work in WH40k. You should not even think about it. Do this and you are going to get burned and you will deserve all of it".
I am a pretty open minded person and I don't mind IP and genre crossovers in case it is fun and could actually work, or would have some very comedic results, but even I am not that stupid to actually try to bend and break a setting of a universe. (I have played with such ideas as for example the Fallout universe was part of the Star Trek universe, the BOS supporting Zefram Cochrane's warp engine research and development, or a Star Trek/Star Wars crossover in which the Borg overrun the Star Wars universe and even learn to use the Force for assimilation of worlds)
But this person, he was just injecting his kink into his other interests and he basically expected the rest of the people who played with him to to just accept it and play along with it.
This is stuff you need to discuss in advance with people, you can't just put it in because you feel like it.
It would be like if I decided to join an AD&D campaign and suddenly claim that I came across a human spaceship from the Halo games full of Spartan Power Armor and advanced energy weapons and expect that we get to use these now.
I don't just screw up the campaign, I am basically annoying my fellow adventurers and the game master.