Yep. Tried both those things and it doesn't let you do anything with it besides tell a sim to "Resume cooking" if the food is still good (which they can't do...just stand there waving at you that they aren't able to access the items) or later "throw away" and the sims can't do that either. I finally just moved my family out to a bigger better house and then when I saw their inventory after they'd moved in...there were the Demon Weiners. And I decided I wasn't touching them again and learned my lesson and just left them be in the inventory.
Oh, I don't know any kleptomaniac sims and how would they know to steal that item that nobody can even access? LOL...Oh well, I also have a ghost sim in that same household in the entertainment field and she is a "Serious Musiciaon" but for some reason she changes into the Llama mascot outfit when she leaves for her Serious Music job. I think she's glitched out. Also it is supposed to only be until 3 p.m. but she's been "at work" for almost 42 hours and she's really red (I just used the mod cheat to green her up or she would die). But shs's supposedly at work but she's at home so maybe she's a split personaliy? I'm going to resurrect her as soon as another sim in the house can make ambrosia so maybe that will unglitch her?