Copy Protection On Demos

So I downloaded the new Tomb Raider Legend Demo and all I can say is that "the security module could not be activated" because that is as much play experience as I got from it.

I don't know why anybody would put copy protection on a downloadable demo, but in this case and in a few others it has stopped me demoing the game. If that happens I go from "might not buy game, but see what the demo is like first" to "fuck you publishers, see if I ever buy anything from you again".