I'd expect Elsevier to sue them for commandeering their domain name like this. Blocking elsevier.com is one thing (possibly actionable in itself), but taking them to a different site with its own political agenda is a much bigger problem. What if they were hijacking a political party's site, or a government site, or any number of other scenarios? Even if they're up-front about the hijacking, they're still effectively taking control of something that doesn't belong to them, regardless of how one might feel about what Elsevier does.