For personal reasons I would not . . . mainly because I keep a horse, and have helped in the rescue of several horses that were going to be sold for 'dog meat' . . . and no they were not Old (3YO), wild (Thoroughbred), Stolen, (Ex Racer).
A beast such as I have described goes for dog meat at 600 quid (around a 500Kg animal) . . . I must ask at the farm how much a cow goes for.
Bute is a serious issue, and at the moment an awful lot of 'domestic' animals are being 'got rid off' due to the expense of keeping them, it could very well get into the food chain. . . I object to the 36 hour trip without rest food or water, to France for slaughter.
As for horses that are raised for slaughter (and given the number of race horses that are bred and don't make it, this means a lot of them), then as long as it is done humanely I have no issue with it, it is just a personal choice on my part not to eat it, although I may have done so in the past unknowingly.
I love the way it is being described in the media as 'contamination' sorry but that implies an accidental low level event . . .with the quantities of horse being found, 60%+, that is no accident! Someone here has found a cheap source of red meat, and has made a significant profit on it. . . . Especially easy to do with Mechanically Recovered Meat.
I have eaten a close relative in Zebra, as well as other sorts of antelope, snake, crocodile, and have tried squirrel . . .not sure I'd want to make a meal of it though