FWIW, people put their turkeys in paper grocery bags for many years. Sometimes I could actually taste the bag on the turkey, so it may not be the best idea. I'd definitely rather use parchment over a paper bag, but in a pinch, I'd go with the bag, and not worry about the health aspects, but more what it will do to the flavor.
A few folks here have used straight brown craft paper with good results. Haven't heard anything about off flavorings with that either.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. SJS Mini-WSM. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)