a horse that i had in my desert temple has been stolen (the 2 blocks used in this theft appear to have been left behind), and my villager breeder was turned off (they can't over breed) and some other blocks have been used as ladders it would appear.
my guess is a server tourist and a bit of a MC noob in general.
usable warp to the area is "pigprojectd" the horse pen is just to the right and some cobble at the top level.