My 11 year old brother is doin my head in!!!?

He keeps trying to scare me.1. last night i went to bed a half hour later than the rest of the family. when i got to the top of the stairs he walked out of the bathroom (it was dark) to scare me.2. im sat on the sofa on my laptop, he walked in and stood behind me (i didnt realise) and we went boo to make me jump.i know it seems harmless but its pissin me off so fukin much (sorry about the language) what do i do!!!!! grr
Answer
Show him this post. it will make him stop if he knows that e one knows what a bad boy he is .