delericho
Legend
Is it a dick move to have foes (of course make them roll stealth checks etc) spy on and stalk the party and when they hear the party talking out loud about how low on resources they are to step out laugh at the party tell them "We appreciate you telling us how hurt you are, it will make it so much easier to kill you" and then attack the party?
It's entirely reasonable to have the bad guys keep track of the PCs and choose the optimum time to strike. That's likely to be just after a major battle against someone else, precisely because they'll be low on hit points and spells.
It's a bad idea to have the bad guys gloat about it - best case, you're generating bad feeling amongst your players; worst case, the dice gods will hear you and invoke their own ironic punishment.