Have you ever been to a hospital? The NHS has absolutely no qualms about shocking overuse of clip art everywhere. The NHS would collapse without that little stickman clicking his heels together.
When the NHS builds a new hospital, (or any GP builds a new surgery for that matter), before opening it they have a week dedicated to just printing out crappy overly-authoritarian signs, spilling coffee on them, scrunching them up and then sticking them to every available wall with copious amounts of sellotape.