Absolutely. It's in this vein that I rate 3* as a base (get me from A-B without crashing or similar incident) and go up/down from there based on the overall ex

Absolutely. It's in this vein that I rate 3* as a base (get me from A-B without crashing or similar incident) and go up/down from there based on the overall experience. There's people in this thread stating they've given drivers who've provided bad or unacceptable service 5*, just because. It is, as you state, this behaviour which is the root of the problem in these systems.