The fake spiders, I hasten to explain, are too humunguous (sp?) to fit in ANYBODY's mouth. They can be measured in MANY inches. You might bust your jaw just trying to cram them between your teeth ... (poor Senoufou!)
Well, something actually did get taken down, and it wasn't what I would have stopped to think of: there were "fairy lights", as they call them in the UK, like Christmas decoration lights, on a long electric cord, except these were orange with black Halloween decorative touches. The patients who did the Sunday decorating had wound the "fairy lights" around a stair bannister. The lights are gone now, and the bannister is once again un-adorned.
Human skull decorations in every conceivable size are sprinkled about, however, and somebody could more easily choke themselves on one of the tiniest skull thingies, now I think of it ...