Here is my favorite Canadian joke (and I can laugh because I am Canadian and it does apply to me)
What is the difference between a Canadian and a canoe???..... you have more chance of tipping from a canoe!!
It is funny how you see that the argument is developing that a "service" should be tipped but a product should not. Does this mean that we have a legitimate expectation to receive a tip, as detailers, because we provide a service??.... and if we don't receive one we should mistreat the customer, or customer's property (or somehow get retribution at their expense by putting sugar in their tank, etc..)?
I've heard the argument before that you tip at a restaurant to make sure that they don't spit in your food (or worst). I've rarely seen waiters/waitresses that were genuinely happy with their choice of employment, so the size of the tip (or a tip period) won't fix their crabby attitude. I think the acronym that was shared before regarding T.I.P.S. serves as a reminder to be prompt, courteous, etc... but does not give the one at the receiving end of a tip the right to judge the ones that do not tip.
How would you react to the following scenario. A family of 4, with 2 hard working parent barely able to make ends meet, decide to splurge and reward themselves by going to a dine in restaurant (even though they can't really afford it), and choose to split entrees, drink water and barely have enough on hand to pay the bill and can't really leave a 20% tip. Would your position be:
1) Stay at home (in your rut) until you can bring the family to a place you can afford and make sure to have the tip?
OR
2) I will be glad to serve and bring a sliver of happiness in your heart and treat you like royalty despite the fact that you cannot really afford it?
Here is another question to ponder on....My primary occupation is in the service industry (being a physical therapist). Should I expect a tip in addition to my primary salary? or a tip no longer applicable because I CHOSE to improve my condition by going to school and becoming a white collar professional?