I tend not to mind folding itself overmuch myself: personally, I don’t find it much different to linking to an article published elsewhere. What I do find causes me problems is where the content of feeds doesn’t stand by itself, making the text that appears in the aggregator difficult to parse. It takes me much longer to even scan such posts than to handle most others due to the greater effort involved in understanding the unusual presentation. One common culprit here is software that strips markup from the feeds it generates, another is folds constructed automatically which frequently break the text in unsuitable places.