Question on Bard kiting and trains.

[Morndenkainen]

So say a bard's running around and training a bunch of stuff behind him trying to AoE it to death. He croaks, and then the next thing you know, your pet's dead getting attacked by a horde of things that are green to you that you never even saw... Is that something the bard would get in trouble for, or considered a "normal" feature? The walk back to your corpse aside, the xp loss, especially on a hell level is atrocious and makes me want to choke the idiot. Especially when he's kiting a group of 10+