I want to do something like this to Maven (because I can't brutally slaughter her since she's "important to the plot" or whatever): basically just break into her house and rearrange her belongings. If it were possible to take corpses through loading screens, Lady Blackbriar would wake up one morning to find her entire home filled with skeever corpses. Just, skeever corpses everywhere. Especially in her wardrobes. Would not actually steal anything, ever, because she's technically protected by the Thieve's Guild and theft is a crime. But I doubt even Maven will ever be able to steal back her dignity. Alternative possibilities include: replace all art with Talos-specific religious objects/art and carving "THALMOR SUCK PRAISE TALOS" in huge letters on the outside of her house; dump the contents of every container in her house on the floor; and my personal favorite, leave cryptic, anonymous messages claiming to have stolen something--not saying what was stolen--without ever actually stealing anything.