I Love My Sibling's Junk Drawer Chaos

Okay, so I have to admit something. Every time my sister tries to clean up her junk drawer in our room, I sneak back in afterward and completely rearrange it just for the chaos of it. It’s like a little rebellion against her OCD tendencies. But here’s the thing, I do it in such an elaborate way that even when she catches me, she can’t figure out how I did it so fast. Sometimes I’m adding stickers or mixing up all the pens and pencils until they’re unrecognizable. And honestly, every time she gets so frustrated and asks for help cleaning but secretly she likes a little mystery in there too because she never really figures out what’s mine versus hers. Is this normal? Should I feel bad about it? Or is it just my way of keeping things interesting at home?