This is a pretty good article (20 page PDF) that looks at the limits of analytics in designing learning programs and makes some recommendations for higher-level constraints. "The network structure does not reveal everything," writes Daniel Domínguez Figaredo. Things as varied as pedagogical approach and harmful content need to be considered and regulated from a wider context. "In many cases, researchers using social network analysis take into consideration the structural properties of the whole network to infer from them other properties of the links between the different nodes." The table at the end of the paper is a pretty good listing (and accords well with my own look at ethical issues in learning analytics).