The beauty of this thread is that it makes it clear who the scumbags are.
I don't think it's as much as "scumbags" over the need for our culture to have a chat, like we're doing, about the idea of gratuities.
Personally, I'd like a system where it was included or programmed right into the price so if one does tip, it's clearly seen as a gratuity for going above and beyond rather than fully customary because it can be confusing.
Some airport Burger Kings have a tip jar. Which is hilarious because tipping at a fast food joint isn't particularly customary. But Chipotle, a company that have the illusion of caring a lot more about "first quality" than Burger King doesn't have a tip jar.
Why would I tip the Starbucks cashier that grabbed a cup, pivoted, and dispensed a tall cup of "Pike Place Roast" but I'd happily tip the tattooed barista at Press Coffee (Scottsdale, it's awesome!) that milked a design of a tulip in my caffe latte in a ceramic mug.