How do 당신 deal with an annoying sibling?

I dunno, I never had one, me and my sister never once had an arguement 또는 a fight and we have always been nice to each other, the worst thing I ever did to my sister was pull her hair a bunch of times...but I was just a little toddler, though XP

Works every time :)
They won't be bothering 당신 anymore.