per another comment below, i'm not arguing that they necessarily intended to collect additional information from the outset; just that they must have known that

per another comment below, i'm not arguing that they necessarily intended to collect additional information from the outset; just that they must have known that lots of other information would likely be swept up with beacon packets once they started collecting. thinking about it counterfactually, they could have pretty easily discarded everything that obviously was not what they were claiming to capture at the point of collection (and interfaces to do so are built into the open-source tools you allude to), but it seems pretty clear that they proceeded for a pretty long time.