I've got some 3M wire hooks stuck on the back of my front plate and it's hanging on the front grill. I also put some foam tape on the back to prevent any rubbing on anything, and it's not loose enough to fall off but easily removable for cleaning or track time. I've had no problems with overheating during normal driving here in New England. YMMV for anyone in TX or AZ.
2011 Evora S 2+2 in Persian Blue with Oyster
2003 350Z, Track edition
2013 Boxster S 981
2014 Xterra, for 6 months of winter and mud season