Ruin Explorer
Legend
See "up and down like a ping pong ball" comment, above. It's rather common, in my experience. At some point, the bad guys are going to catch on.
Metagaming? Not really.
No, really, it is (obviously imho, but everything in this thread is). Until the enemies have seen the healer get a PC up, then it's metagame-tastic to be CdG'ing the players, particularly if the enemies are stupid humanoids or something more dumb. Hungry creatures I can understand, but if you're going to play it that way, you better damn well KEEP them next to the PC chewing on him and giving Combat Advantage (Distracted) to the rest of the PCs until they're attacked (and even then, they're likely to go back to their kill). Smart enemies who know how the D&D world works in detail (Drow, for example) might CdG more, though even that is questionable.
I do agree that if the Cleric/Warlord insists on popping the dying PCs back up in the midst of enemies repeatedly, they're going to catch on, though. Still, why would they believe hitting his corpse would make him "stay dead"? I don't see any reason why they'd think that unless they carefully examined him.
Rather they would be extremely angry with the Cleric/Warlord and attempt to come over and kill them.
Rodrigo - The PCs never do it, because the monsters don't have negative HP. What's good for the goose is literally impossible for the gander in this case. So your point is moot. It is metagaming unless the enemies are smart and experienced with this particular kind of foe.