Most likely the contract with Elsevier prohibits this. In the fine print, "unlimited access" is probably defined as something like "what we, the publisher, cons

Most likely the contract with Elsevier prohibits this. In the fine print, "unlimited access" is probably defined as something like "what we, the publisher, consider normal/reasonable reading speeds by a human using our site/server." At my academic library, for example, it's common, and apparently contractually sanctioned, for a publisher to temporarily IP-block a computer that they deem to be engaging in "excessive" or software-mediated downloading.