i should've clarified:
stack humping is what the guys recipe called for, the act of standing really close to one of the speaker stacks and taping that instead of recording a stereo mix of the concert. alot of times the instruments aren't being fed through both stacks so a stack humped tape will be lacking sound that should be on the tape. i guess the advantage of stack humping is that the music will be extremely loud that close to the speakers which, in theory, should produce a tape with less crowd noise. i PERSONALLY think this is a shitty way to make a tape and you're probably more likely to be spotted by security since you're standing a couple of feet away from the stage security crew, when you're standing FOBDFC you're just some person in a sea of people and most of the time there's no security personnel anywhere near you. do what you want though, they're your own tapes to listen to. i just think with so much focus on what gear sounds best the taper should at least be trying to pull the best tape possible at every show. i know sometimes it's logistically impossible to get in the sweet spot but with a decent rig you'll be ok if you're a little off center.
stack taping, as in pointing mics at stage stacks instead of running a strict ortf/din/xy or whatever, can be beneficial in venues that are oblong sideways or have shittastic room acoustics. when you're aiming directly at the stacks with a card pattern you'll be picking up more direct stack sound than ambient sound so you can sometimes correct for shitty venues. i've noticed that this technique can yield tapes a bit on the bright side though so i don't even consider it unless it's a really crappy room that i'm taping in.
AND TEDDY, SPEAKING YOUR MIND IS NOT A CRIME! I DO WHAT I WANT BITCHES!