In case already told "Spoiler" beforehand but still got lot of 'thump down' then it's nothing related to 'like or dislike' spoiler at all.
It's another hidden issues; conflict, jealousy or maliciousness. We have to see case by case.
I know about this case more than anyone here.
because they want to discover what's happening by themselves.
It depends what spoil you told me... if it's major plot twist, i will flip a table, because it kills the fun to be surprise by the story ;)
I wonder why some people don't like (nearhate) spoiler. . . .????
I'm fine with it , (=・ω・=)