The Federal Trade Commission requires that publishers disclose to their readers when they endorse a product or service and have a "material connection" to the seller. If a publisher is using affiliated links, with or without Shareaholic, they have that connection. Including a disclosure in an appropriate section of the Publisher Site is a great way to disclose this connection to your visitors:
"Our website may contain affiliate marketing links, which means we may get paid commission on sales of those products or services we write about. Unless stated otherwise, our editorial content is not influenced by advertisers or affiliate partnerships. This disclosure is provided in accordance with the Federal Trade Commission's 16 CFR § 255.5: Guides Concerning the Use of Endorsements and Testimonials in Advertising."