Allegations are being made that Uber took liberties with iOS, by fingerprinting, i.e. using identifiers to recognise a device even after wiping. 

Uber itself is pushing back on the allegations, stating that tracking is a common industry practice used to prevent fraud and account compromise.

While one can sympathise with the need for developers to address fraud. A line needs to be drawn where individuals or their locations should not be tracked once an app has been deleted.