Yep. The mids are a touch loose too, but the rears are the issue.Is it the rear mounting foot? If so, it's not too hard to drop just the rear corner of the headliner and get those tightened up.
I haven't noticed any leaking or anything (but I'm a little worried it might start), so I'm not going to tackle it right now. I went ahead and bolted the rack on to test for a few days.
In the near future I'm going to pull some trim around the rear hatch to do some wiring for lighting anyway, so I'll probably tackle it then.
Just thought it was odd that they got that loose on their own, with no real use.