The thousands of threads on tipping on Flyertalk are usually some of the funniest.

There are pretty much three kids of people in the world.

• People who hate tipping and will look for any reason not to leave anything
• People who will always tip 15% no matter what, calculating it to the nearest penny on a calculator
• People who feel tips are earned, and will adjust up or down based on the service they are provided

No amount of argument of somebody should or should not get more money because they carried a plate of lobster from the kitchen instead of the blue plate burger special will ever change anybody's position.

In all the years, I've never seen somebody say they were adjusting how they tipped based on what they were told in a thread here.

Nor will percentage based tipping, the norm for well over a hundred years ever change.

Waiters go to seminars to learn the tricks to ensure a good tip. How to know the customers who will tip and those who won't. A waitress knows drawing a smiley face on a bill raises the tip on average 20%. A waiter knows drawing a smiley face on a bill lowers their tip on average 10%.

This isn't some random thing, it's a well studied science.

And it's not going to change any time soon.