Okay this is my first attempt at an SCP:
Hard to contain art: A piece of art made by AWCY? that teleports it self to crowded areas were lots of people can see it. If there's not a sufficient number of people around to view it then it will teleport to an area were there are.
The containment procedures would probably be to put it on display in a glass case in some place in the site were there is a lot of traffic so that sufficient amounts of people could see it. If it does teleport away then they could just send a MTF after it and break out the amneisaks.
How many people need to view it for it to stay in an area? well I would guess a hundred or so. The Foundation has a lot of resources but having a hundred D-Class to constantly monitor an euclid that posses no danger to human life is excessive. Also the larger sitesprobably have a 1000 personal so there is probably an area of the site were a couple hundred people are passing through at any given time. And these containment procedures would make an interesting hook.