Of course questions of legality have arisen during the history of Conveniences and Inconveniences.
Some people are not going to be pleased, and are going to want someone else to be liable.
This convenience recommends quarantine and reassurance to counteract any dream interruption or dream rerouting.
Carriers of Dreamers—Liability for Interruption of a Dream
Quarantine the dreaming passenger
and inform her of the
momentary creative change of her journey.
No need to create panic and depression.
Source: Carriers of Passengers. Liability for Interruption of Journey, published in 1907 by The Virginia Law Register