Okay, i get the hate, but i also would like to actually interact with more dark elves because when we talked they were really interesting and Mathilde literally bought shit from a person so mutated they needed a translator.
And it was a hardline Slaanesh worshipper to boot. And she gave him the money he needed to fully ascend to Slaanesh as quite possibly a daemon prince.
I feel like buying books we might be interested in is the least evil thing here.
Playing devil's advocate... it's one more daemon in the Deep Wastes. Why should anyone care, they can walk around free up there.