I thought horse could only die from another player if you were ON the horse? I've never actually had my horse die when parked other then from nearby mobs or a world boss that drifted... so I really don't know. Can parked horses with no rider die from red players?

Usually they cant, but they are targettable if you are riding them / have been riding them recently, or are in a duel with that player.

Was just thinking the same thing. Like @Minarya mentioned your horse can't be attacked unless you're on it, have been on it very recently, or are in a duel. Like, I've been killed while mounted and they were still able to attack my horse for a short time. If you horse has decent stats and gear, that's not usually a problem because the can't attack for very long. There's a short window for that I think they have to attack your horse before it enters 'resting' mode. Because technically it's not 'parked.' But I've never seen a player able to go up and attack a parked horse (even on Arsha). I'm not sure on the Arsha anonymous, however. The only way (that I know of) where a player can cause the death of a parked mount is by dragging mobs over to it. But you'd have to be parked rather close to the mobs in the first place for that to be a problem.

If you're in Kamasylvia a poacher (ncp) can randomly spawn near your horse and repeatedly shoot it. It's happened to my horse before and to a friend of mine's.

I dunno; I think it's open season haha. I thought you might have to be flagged, but iirc this guy was beating on my horse when I left it out in the open, and I don't think I had flagged on him yet.

I admit I found this dude's horse on Arsha and started beating on it until he ran away LOL. I hide my horse. He thought he did, but once I found it he was OUT. It's like yea go ahead and pk me I found your horse!!

It def is griefy, though. It's hilarious to blow people up on their horses. Dude and their horse just getting melted.

I dunno, bdo haha.