Earlier quoted context omitted.
My rule of thumb with Lyft is that if the driver mentions giving them a good rating or tip, they get no tip. Directly asking for a tip (and thereby creating a guilt-ridden obligation) violates the implied social contract around tipping. (Think about other services where a tip is expected: it is rare for anyone to verbally mention a tip.) When I used to use Uber, my policy was that if a driver asked for a tip, I would…
Tip jars are never tasteful, putting a tip jar out is equivalent to panhandling, IMO. A business is a place for business transactions, not begging.
If you are especially pleased with a service on a particular occasion, then you should tip. If you are the type of person who is never pleased with anything, then you should certainly feel no obligation to tip, ever.
This whole exchange reminds me of an episode of Black Mirror.
* (edit: Then again, after reading some more of the impressions on this page, I think I may be privileged that I am in a relatively small midwestern city where Uber and Lyft both offer service. I have never been asked to tip, by any of the drivers I've used on either service. It sounds like that is far from the norm, at least in areas where HN users are.)