Unless your base is completely walled in and all doors/gates are closed you would be surprised at some of the things mobs destroy.

Last night I JUST placed a beehive and a draugher bowman destroyed it instantly (it was a 1 star.)

Mobs will run in and go straight for crops as well, lost half twice by the time I finished the wall.

I actually lost a karve the other day because the mobs wandered in by my dock which had a workbench that was not 100% enclosed. The mobs destroyed the workbench and the karve. Since the workshop as gone the materials for the karve despawned. Ever since I enclose or bury my workbenches.