When your dead teammate drops a health capsule or two, the implication is that you are supposed to USE the health capsule and then REVIVE the dead teammate. Is that so hard to understand?
I can't tell you how many times now I have seen the following scenario: Room full of retrodes kills 3/4 of the party. Last guy alive is nearly dead. Dead teammate drops him some health capsules. Living moron either uses them immediately, but instead of reviving anyone, runs straight into the middle of the entire pack of enemies and loses the health all over again, OR doesn't even use them and spends ten minutes cautiously killing them by himself... and after they are all dead, STILL REFUSES TO USE THE HEALTH CAPSULES AND OR REVIVE ANY OF THE DEAD TEAMMATES. Two floors later (assuming the group survives that long with a cowardly teammate who refuses to revive anyone) he makes an unannounced trip back to town, leaving THREE health capsules behind at the top of the elevator while the rest of the group, all lacking health capsules, and short on energy after being forced to revive themselves, continue on to the next level short a man (as useless as that man happened to be) and each missing most of their health.
Revive your teammates and don't hoard health capsules unless you are 100% certain you're going to be using them for a boss battle sometime in the next few floors. Warn people before you go back to town and drop all of your stuff before getting on the elevator.
Please and thank you. >:I
This probably happens mostly when partying with randoms, but you can't expect much of anything from randoms in any game.
If this -isn't- a random, and just some idiot, then teach him, and if he can't learn then never bring him along for anything, ever.