I have 2 observations:
1. Having a very desireable field gives the furballers a place to congregate and beat the crap out of each other. This is a good thing IMHO. It also lets players who value "strat" and field capture do their thing away from the main ruckus, so quite a bit of field capture can go on away from the furball near A1.
2. Shut up and kill. If you're outnumbered, your K/D and K/S WILL GO UP over time. It's called a target rich environment. Of course, you can't be stupid about it... If the field you insist on rolling from is capped by 20 bandits, you're probably not going to survive very long. If however you can get 2-3 friends to follow you to a large gaggle of enemies, you're going to start racking up the kills.
FWIW, the squealing Pigs got whatever reputation we have over the years by working well together under all circumstances. The guys in my squadron have no problem whatsoever taking 4 pigs into double our numbers of enemies, and we honestly expect to kill everyone and RTB. It's not that we're that good individually (although some pigs really ARE that good), mostly it's because we watch each other's back and don't all go chasing after the first bandit we see.
Example - 4 pigs fly off to find a furball. One pig gets killed shortly after takeoff by a flakpanzer (I can't resist strafing those things), so he replanes and chases off after the other 3. Soon, the lone pig hears radio calls about a furball the 3 pigs are involved in, so he uses WEP to catch up. Instead of flying direct at low alt though, the fourth little piggy grabs some altitude enroute so he's not useless when he shows up. Sure enough, the 4th pig arrives and sees only 2 piggies left alive, but they're both in offensive positions. What does the 4th little pig do?
Does he -
1. Dive in and try to get a quick kill
2. Scope the situation out and intercept the bandit just entering the fight from med-high alt?
3. Wait while the high bandit dives on the 2 pigs (blowing all his energy in the process) before diving in to kill the now low energy bandit?
4. Find a low bandit being chased by a dozen friendlies and join the chase?
Most pigs will automatically choose #2, because as a general rule we trust each other to provide cover and 6 clearing instead of everyone chasing after the low bandit hoping they luck out and get the kill. Most of the people who whine about being outnumbered are the ones who gaggle about chasing after low enemy runstangs, then act suprised when they get picked off one by one as they're drug under a cloud of higher bandits.
What the cluebird is trying to say, is that when you're outnumbered, working together even just a little bit can result in consistent multiple-kill sorties and a much better chance that you'll RTB to land your kills. On top of that, being outnumbered means that there are more stupid bandits to kill (all bandits are stupid, otherwise they wouldn't be bandits duh)

It's a little tougher sometimes when your country is outnumbered especially if you're only in it for the field capture or strat elements of the game. If you're in it for the air combat however, being outnumbered is the way to go. If necessary, just grab a stang, climb to 50k, and motor around looking for single bandits away from the main fights (remind anyone of eman?). Your kill/hour will probably be pretty low and you'll have to run away all the time (remind anyone of eman?), but you'll survive and probably rack up a number of kills along the way.
I of course prefer to get a few friends and dive into the nearest furball, but that's just 'cause it usually works.
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eagl <squealing Pigs> BYA
Oink Oink To War!!!