Re-imagining the Ringwraiths

[William Cloud Hicklin]

to simultaneously strike with potentially deadly force....in the very building where the Ring was hiding

though the ruined beds in the Prancing Pony should be a reminder that they do act more in the physical realm

This is a very common misperception, which PJ picked up and ran with- but it's in error. Tolkien was explicit (it's somewhere in HME or UT) that the Pony burglary was carried out by Bill Ferny, Harry Goatleaf and the cross-eyed Southerner at the Wraiths' orders, not by the Nazgul personally.