I dont see the problem with riding a horse while drunk. I think it would be so freakin cool to roll up to a kegger on a horse. As for harming the horse, I dont see how that would happen. I mean, I dont beat on girls when I'm drunk, and I dont kick dogs when I'm drunk...how would the horse be harmed?
the only problems I see is that I drink at night, and the horse might get hit by a car, but that would be a problem drunk or not. Also, I'd be worried about people messing with my horse while I'm in the party drinking. but this is hypothetical, right? there'd be a "horse lot" where other drunks would bring their horses, and the horses can have a party while I'm partying.
and when the night is over and if I get lucky and I end up bringing a girl home with me, she can ride on my horse into the sunrise. I mean, thats pretty cool, right?
horses for drunks all the way!