Thought I'd bring the "I could eat a horse" converation in here.
Surely horse meat is just as expensive as beef?
I am guessing that horses are killed when they are knackered. In the UK they would be buried or burnt, (not sure if they still render tham down at knackers yards). Makes sense to eat them. I think our squeemishness is because nowadays they are bred for recreation not work. I'll be in France later this year and will be straight down the boucherie chevaline's.
Vegetarians have argued that its a small step to canabalism. The reason canabalism is taboo is that there is a small step from eating a dead body to precipitating a premature death when you are peckish. That's what we do with cows and pigs. If canibalism wasn't taboo you can imagine factory farmed lard arses.