It's not a matter of crappy hardware, it's a matter of not wasting hardware. Some people like to overuse their hardware, which results in their computer - no matter how powerful - is always cluttered and slow as hell (I've got a close friend who's like that, he's very computer aware yet has a system as optimized as the worst computer illiterate, only not with the same kind of junk). I'm not one of them. I like my hardware being as underused as possible, so I can run whatever I do need to run at the highest possible speed. Which make me not like very much some I/O hungry application which also happens to use a non-negligible amount of HD.
Granted it's not a big deal at the current level, but again, I can only foresee big trouble with 100 times the amount of users and transactions. Nothing urgent there, and I surely don't want my coins to evaporate either, but a solution will have to be found at some point. Denying the issue can only make things worse, delaying the research of solutions. Just because there are many things wrong about ScamCoin doesn't mean all ScamKing says is rubbish: resource usage is a real potential issue, even though it's not a dramatic problem at this very moment or (hopefully) in the near future.