Tefka
I have no problem telling people that the GA is going through one right now. It was accepted and the invasion is being reviewed again. I will admit the criteria for when a second chance is accepted is as cryptic and seemingly nonsensical as many other things on Chaos. That being said, I really don't have a problem with them, not even when being party to one.
I do think, based on feedback I've heard from others, that factions have frequently used them as ways to drum up salt, delay the inevitable, and gum up the works. But, an MFO's job is to do the right thing for their faction and I would use a second chance if I genuinely felt a ruling was unfair.
With all this in mind, the invasion review process is already exhaustive. It takes many days, is overseen by an admin, and based on clearly defined criteria. Given that a second chance has never changed the outcome of an invasion, the point they would seem to serve is pretty non-existent. Eliminate second chances, leave it to the staff judging invasions to do their jobs.