Whee. Now actually seen the new Bond, so no further fear of humorous-reference spoilers. The particular humorous reference I hadn't wished to be told about on Saturday turned out to be more like a criminally missed opportunity for one, so bah to that. Also the theme tune sucked and the dialogue was almost as bad as Star Wars 2. But apart from that, it was big and flashy and acceptably Bondesque, so that was all right.
I wonder how you re-train office cleaners? Recently I left a piece of paper on my keyboard before going home from work, on the grounds that that way I'd be guaranteed to see it the next morning and be reminded of what I needed to do. The cleaners saw this large piece of paper with prominent red writing on it sitting on the keyboard, decided it was clutter, and filed it in the pile of paper at one end of my desk, under several other things. I would leave them a note next time asking them not to do that, but I have no real trust that they'd read the note rather than simply giving it the same treatment. Perhaps the only answer is to stay late at work, hide under the desk with a mallet, and pop out and re-educate them at the appropriate moment.