I think you had to see what my Mac was doing to appreciate.
I have fixed PCs with dodgy RAM before. They either didn't recognise the RAM or crashed but mainly they would fail to boot and always wouldn't acknowledge the RAM in the first place.
Lets remember here, with my Mac I inserted the RAM on the first day, it worked ABSOLUTLY FINE for three whole daysand nights all the while acknowledging the RAM was there (IE showing 2 gig as opposed to the stock 1 gig)
Then for no reason things started shutting as I was using them, the OS needed repairing, Constant crashing.
I have never experienced any deylayed reaction lkike this on a PC and have worked on PCs for many years.
As said, faulty RAM in a PC in my experience meant the PC wont boot or wont recognise it. Not work fine a few days then go completely mad.
Had these bizzare event happened as soon as the RAM was installed I would have known where to look for the problem.
I mean, what happens if I fit a graphics card that doesn't work? Will my Mac magically make it work for three whole days and then not display graphics?