People have already did. I would (Depending on the person.) tell them to fuck off,ignore them,don't even socialize o entertain the thought of being with them,or insult their favorito! things back and when they dislike it and perra about what I did I will throw everything they dicho in their face.
BUT if they dislike it in a polite way I will respect that person far más than I would respect the hypothetical douche I just described.
xD I remember when one my best friends looked into my música biblioteca and saw all my K-pop and Vocaloid songs... They looked at me like 'o_e What is this?!' But I just replied por telling them it's nothing ^^" She didn't mind it...So... But if someone did in fact say they hated it, I wouldn't care because that is their opinion and no matter what they say, I will always have Luka Luka★Night Fever and amor Vocaloid! X3 And when I grow up I'll run away to the mountains like Miku and bring all my Vocaloid merchandise and stay there forever~ @_@