You need a few people in a "living room" to put "made in Vietnam" stickers on things. That makes the living room a factory and so you are not legally tricking anyone even though your only part in the process is putting that sticker on.
Reminds me of the old rumor that the city of Usa, Japan exists so they can print "Made in Usa" on exports. They actually don't do that and Usa has held its name longer than the actual United Stats has existed but it still makes for a good story.
