In your example, the presence shows that the integrity of your system has been compromised. If this sculpture showed up inside of a high security museum display case, then your analogy would make sense.
https://web.archive.org/web/20111221041147/http://www.artfla... http://www.theguardian.com/local-government-network/2014/jun... http://hyperallergic.com/11146/8-deadly-works-of-art/
Edit: I think I know what you mean based on your other reply to me; I'll respond there unless you want to clarify anyway.
People leave cool stuff places. It happens. I mean how many times have cell phones been left somewhere on accident say, which if it was on purpose doesn't matter either -- OH NO, PARK BENCH SSL CERT MITM ATTACKED, PURGE YOUR LUNCHBOXES
No, it's an object left/put there. So unput it there. That's what parks & recreation does all the rest of the time. Now it's a rad piece of art, not a cell phone, not an umbrella, etc.