My sister is always taking my stuff without asking and it pisses me off so I have vowed to get revenge... any good ideas?

I have sisters too you could switch their perfume or shampoo for your dads take something of hers or text someone she knows just make sure you don't get in trouble if u do then she has still "won"

Look at these answers https://www.askmehelpdesk.com/humor-comedy/getting-revenge-sister-492758.html#.T-uM4id5mc1

I'm a master of revenge. If you're serious about getting even with her, then follow these instructions:

Find a full grown gorilla. This might be hard to do but you could try eBay or craigslist and may be able to find one cheap. Anyway, after you have this full grown gorilla, try to find a full grown elephant... again, try the above mentioned sources. Once you have the gorilla and elephant, try and find a hippo.

Now comes the good part... once you have all these 3 animals, sneak them into her room. Put the elephant in her closet. Put the hippo in her bed (be sure to cover it completely so she doesn't see it). Take the gorilla and put it in one of her drawers.

Make sure you have a video camera to get her reaction when she discovers these hidden animals. The best part about this? Well, the hippo and elephant make real big poop so it could become messy in her bed and closet. The gorilla will probably be incredibly angry for being locked in a drawer and will probably destroy her room once he's let out.

You can thank me for helping you later but be sure to let me know how this all goes!

Wow OK I'm not stupid and I was being serious... I want only serious responses @odinn7

... i want only serious responses @odinn7

This is Ask Me Help Desk... Not Revenge For You. Nobody in their right mind is going to really help you get revenge.

And so you know, my response was serious. It's not my fault if you aren't capable of carrying out such a simple plan.

Well, Get a lock for your room and keep the key, to make sure she doesn't have access to the room. Second, get your phone out and take pictures of every stupid things that have the possibility to ruin her life. Then post it on a random blog or something similar to it or her boyfriend. Doesn't really matter. Or foreign calorie bars.