Roadkill is practically vegan from an ethics point of view. Veganism is all about the most reasonable reduction of animal harm possible. Eating an animal that's already been killed does not cause further suffering to animals, and since roadkill draws scavengers to the roadside, the presence of roadkill can lead to further animal death. Removing roadkill from the roadside is a net positive for animals. It's also more eco-friendly than the usual alternative which is to ship the carcass to a landfill and undergo anaerobic breakdown.
Brain worms are 100 % creepy (I'd even say quite scary). Didn't know you could get them from parasites like those found in roadkill. Did a quick look and you're right. Seems like pork and raccoon tapeworms are the most common sources. Thanks for pointing that out.
I don't think I've ever known someone who eats roadkill, but if I had to imagine one, I guess I'd think they were creepy also.
I guess my comment wasn't very well thought through.