Pilfer, as in steal? None.
That said, there's lots of things that get brought home gratis.
Leftover food from an event, or treats given by grateful patrons.
Odd magazines we don't subscribe to, that we don't wish to add to the catalog.
Orphan donated books, unwanted for the book sale but interesting to me. Sometimes I'm just taking them for a trial run before deciding to add to the collection.
Swag from vendors or system meetings. One book seller had the oddest goodie bag, including pens, notepads, bookmarks, granola bars, gumdrops, and potted lily plants for each of us.
Like the teachers, I'm often donating things back to work: food for events, craft supplies (often from the recycling bin!), children's things my kids have outgrown, etc. When DH was teaching, I always bought ~100 of the cheap notebooks for his student journals.