A worm fence sounds like it should be a couple inches tall and several feet deep, to block the worms.
Wyrm fence is a great name! I'd use one to keep my hoard of treasure safe
Sounds like the name of a startup thats going to put fence contractors out of business in a few years before getting sued for not classifying their workers as employees.
Wyrm = dragon. Wyrmwall/fence would actually be a cool name.