Got into a beef with people that had a house next to me and I have so many funny stories. Stealing their ore while invisible and holding it with my mouse button while it's in "limbo" for hours until they finally gave up and I was able to drag it to my house by moving it from behind me to in front of me one tile at a time as you would be too heavy to move while carrying it (how I stole it from them as well).

You could even chop dead bodies up and re-arrange the body parts in UO. I did that after we had a battle one time and they had to watch me do it while they were in ghost form. Ahhhh, good times.