First off if you up from a capped field and get vulched the shames on you. Period.
If your not savvy enough to take a look around in the tower and see if you can get up or not, you deserve what you get.
I can't improve on the way Hitech said it. However like anything, it gets carried to extremes at times. Little generals screaming about kill the town while they sit over the field and vulch etc. There are guys who really want to do nothing else. However they are often the same guys who won't deack, because they might get killed, or use ammo they could need to rack up another easy kill. Thats where the AH community comes in. We need to first educate, and then police our own.
On the flip side, instead of taking off from that vulched field, up from the next one over, bring something fast, and go vulch the vulchers! They are almost always low, often low on fuel and ammo waiting for the capture. So scream in, kill the troops, vulch the vulchers, and land your kills! There is nothing more satisfying.