These are pranks my freinds and I did last year:
1. Get a trash can full of water. Put it diagonal on their door. Ding dong ditch them, and hide in a bush. They will open the door and the trash can full of water will go all over their house. Funnier if it is their trash can. Warning: make sure they are not right near the door waiting for trick or treaters, and be quiet. We forgot to do this, and one time we brought up the trashcan full of water to thier door, and they opened the door without setting it up.
2. Dress up fully, where you cant see any of you. Get you and a freind to do this. Start walking with a random group about your size, and they wont say a word. They will be like who the **** are these people?
3. Make a fake kid out of wood. Cover it with a costume, and have it so his hands are sticking out with a bag. They will answer the door, and there will be a frozen kid there with his hands sticking out. They either freak out or laugh. If they ask any questions, say your kid is shy and pick him up and walk away.
4. Collect all the pumpkins you can from every house. Create a roadblock full of pumpkins. Or make a pumpkin snowman.
5. Egg/tiepee anybody who gives you shit candy or you know they are there and dont awnser thier door.
6. Piss on somebody's door who doesn't answer the door. Warning: make SURE that they will not answer the door. I did this last year a few times on Halloween, and one of the times the person opened the door and I was pissing on their floor.
7. Save your dogs/cats shits. Put it in a bag, light it on fire and ring the doorbell. Even though this joke is nutritious, people still fall for it every-time.
8. Above all, find random hot chicks and try to hook up with them. Making out with random girls you will never see again is ****ing sweet.