Like many a museum professional, I document brilliant ideas so I can steal borrow them at a later date.
This sign on a door at the Rokeby Museum, a historic house museum in Ferrisburgh, Vermont, is sheer genius. It's right above the latch handle of a door leadin upstairs that must get opened all the time by over-curious visitors.
Text reads: "Not open to the public. But if you're really curious, ask about becoming a volunteer or tour guide."