I suspect that some nobles had someone of a lower status they actively disliked. The strategy of most persons of lower status would be to not be noticed. It follows that there would be some people who would be noticed, and that sometimes, it would be in a bad way. Even in societies where the lords were obliged to feed everyone, I doubt this would prevent them from conferring favors by degree.

I recall one Roman description of a Gallic feast where it's suggested that boasting and fighting between guests would occasionally occur, and that this was regarded as one form of entertainment. (The propaganda purpose behind this, being to portray the Gauls as barbarians who would benefit from being civilized by the Romans.) As a modern person, I have a hard time understanding how, occasionally at least, this wouldn't get someone dis-invited.