I think the most painful part of the Elsevier-eats-Mendeley deal has been watching good people acting as apologists for Elsevier and then feeling hurt when people don’t accept their protestations. You can see a good example (but far from the only one) in the comments to Danah Boyd’s post on her #mendelete. I don’t know what Elsevier have been feeding their new minions, but whatever it is it seems to be working.