For the same reason you wouldn't want someone to spoil the end of a story or a movie before you've had a chance to read/watch it. If you hide the spoilers then only those people who are extremely thirsty will see them, the rest who are casually looking through the comments will be saved from knowing things they don't want to know ahead of time.
The why how you reply to me I think you the one who is rude and I assumed you didn't know etiquette not me and it’s your choice if you don’t want to spoil it or not for me I saw the raw and I choose to spoil it and if you don’t like it then don’t read my cm until the end because I know there are people who will like it :)
just because you like spoilers doesn't mean others do. Again, its common decency to put a spoiler warning. afroluv was just reminding you about it. If you want to spoil it, at least place a spoiler warning so others cant see. Personally, I like spoilers, though others may not, and because others might not, anyone with common sense would see that they should place a warning as its just etiquette on the internet. If you don't like others reminding you this, don't spoil in general.
I just saw chapter 24 Mr.sexy will jerk off while seeing yiyoung pic hehehe