I paid to have mine installed and just got a safety recall yesterday. I got two stickers, one for window, one for rack indicating that if my back window is my only egress then the bikes need to be removed from rack while inside. Given my Airstream model, that's me. There is a good possibility I would get stuck in that window before I would ever run into the bike isse.
2006 Bambi CCD ("EireStream!!")
2001 Teardrop, Mountain Hardware Tent
For some perfection takes a little longer...