“Celebrate the Saga! Reply with your favorite #StarWars memory and you may see it somewhere special on #MayThe4th,” the account for Disney’s streaming service, Disney Plus, tweeted on Monday, using a popular play on the series line “May the Force be with you.”
Hours later, the company added one more tweet, saying that the language applied only to replies to that tweet using the hashtag #MayThe4th and mentioning Disney Plus.
“My favorite Star Wars memory would have to be the time Disney tried to lay legal claim to every tweet on Twitter that used a particular hashtag,” read one popular response.
Another person thought to include Jack Dorsey, the chief executive of Twitter, in a reply, asking, “At what point do you step in and specifically say that hashtags don’t belong to anyone?”
Michael Carrier, a law professor at Rutgers Law School, said that Disney’s tweets raised several questions of contract and intellectual property law.
“For the contractual issue, the question is if you use the Twitter platform, are there any terms of service provided that you are transferring any rights in your material to the service?” Mr. Carrier said. “In this case, the relevant terms of service would be between the user and Twitter. And so Twitter is the one that would have a claim for ownership, and my sense is that they don’t.”
Next, Mr. Carrier said that Disney did not have any intellectual property rights to what users write on Twitter. “Copyright exists to protect creation and it exists from the moment that you create something,” he said. When someone tweets, that person has a copyright to that content, he said.
“It doesn’t matter if you’re sending a message to Disney, it doesn’t matter if you’re using a hashtag that Disney said to use, it doesn’t matter if you mention Disney Plus,” Mr. Carrier said.
Mr. Carrier said that the company’s third, clarifying message suggested that “perhaps they realized they overreached in that initial claim” about using content from Twitter. And he said he still had doubts about the company’s more narrow claim: “The question is does Disney have the right to do that? I don’t think they do.”