I was watching King of the Hill tonight, Peggy got a garden gnome, and this really weird lady comes and complements the gnome, tells peggy about how she'll get lost in the messageboards, "Hey, are you into Babylon 5?" "No, should I be?"
Most civilizations consider garden gnomes a form of weaponized memes -- and therefore ban deployment. Research indicates that most species, when shown an appropriate type of ceramic frog, will descend into utter madness.
Only creatures whose mind implements simulative input analysis, or heuristic effect prediction, have been observed to tolerate extensive exposure to garden gnomes.
Humans unfortunately... are not listed among those species.