Just got my 2007 Hybrid a couple weeks ago and same issue. Very loose Head Restraints, even when they are total down. They seem to flop around when your head touches them. It makes them feel really cheap.

Have not tried bending them yet. I think I am going to let the dealership try and fix them.
I had a 2006 Civic EX and did not have this issue.
I will give an update after my first oil change. (About 5,000 miles)
Good luck!
Jeremy
Birmingham, Alabama