it sounds as if Apple is top of that issue, and want to take care of it quickly, troubleshoot why it caught fire and what needs to be done about it.
What if it's a year after the MBP was bought, but no Applecare, which I don't agree with, but...for argument's sake let's say that this buyer didn't want to deal with AC, it's over a year after he bought it, and the magsafe plug catches fire...my hope is that Apple will do the exact same thing, AC or no.
Still, there is always a need to be careful...we've taken electricity for granted. WE run on electricity. I will be getting a MBP, because I've been saving up for it, and I'm still going to buy one. If Apple didn't bother with that machine, or it took days to get them on the phone, then I'd think twice about a mac, but, gladly, it's not so.