I am a regular CoD player. Lately all I have been playing is Zombies and, as if it needs to be said, it's great. However, I will be honest about one thing: I have a problem with players who cannot carry their own weight.
It is not my fault that you were surrounded, went down, and are about to lose your upgraded [insert weapon name here]. Perhaps try keeping a minimum amount when playing so that if you do come across this problem, you are able to get yourself back up on your feet and in the game.
It is not my responsibility to keep you alive. If you want to spend over 3,000 points on guns and ammo, so be it. Just don't start complaining that you do not have enough to buy something crucial to your survival, such as Jugger-nog or upgrading your gun.
We all have outside lives and time is important to all of us. Relatively, nobody appreciates a host leaving when the entire team just made it past round 30. If you do plan to quit in the short-run, at least consider giving up the responsibility of "Host" to someone who will stick around.
If you aren't sure, then don't revive the guy. This goes back to my first point: Yeah, people will whine and complain, but don't join them. In many cases, the individual will go down more than once in the same round. Of course, it is your choice in the grand scheme of things.
Okay, rant over. You can go back to your normal routine now.