And we do all have responsibility to each other as humans - that's why I hope you don't put yourself in a position to starve to death because other people's file sizes hurt your fee fees.
Discussion
Well this is easy now: I disagree.
I _prefer_ if people do nice things for each other, but nobody is obligated to do so (what if they refuse? Kill em? Lock em up?)
Nobody is coming after private server owners, much less random cloud storage customers. Most people don't care about petty issues like that, and even to someone like me who does care, it's still a petty issue. However, I think we're right smack at the brink of a big population collapse and everyone's choices impact. Petty shit like this will cause indirect consequences, hence the obligation, not with any direct consequences attached.