Certain things might let you know it is probably deer season in your area, and this is one of those things.
Now this is not something you will see every day, and it might startle many at the wheel to look over and see this on the highway if they weren't ready.
The things you will see during deer season...
It is a sure enough sign to let you know that it is deer season in your area though. Pretty humorous, somebody went through a lot of work to get a few laughs. This buck looks to be riding shotgun, probably after getting shotgunned.
I have also seen many scream that this is a huge disrespect to the animal and distasteful. I have a really hard time understanding that. It is all in good fun, and no person or animal is harmed during the process.
If it was harvested in a legal manner, will be eaten, and you haven't physically altered the body in any way...how is this disrespectful? Maybe in some eyes it is I suppose, but most would just say...just creative.