After the SEC clarified that companies can use social media outlets to announce material information, several companies, including Netflix, GE, and AutoNation, filed details with the SEC on their intentions to disclose information on sites such as Twitter and Facebook. Some corporate communication specialists, however, are urging caution. "I think there are some pitfalls," says Laurie Green, a partner with the law firm Holland & Knight. "There are liabilities that go with it."