I don't give tips,ever
This is something that should stop
Do you give a tip for the shop emploee that sold you something?
To the doctor that checked you?
To the old man that gave you newspaper?
To the mailman?
To the tech support of your ISP?
No? you don't? why? don't they "serve" you?
How are pizza delievry guys and waitresses are so different?
Why do they need tip? why do they get tip?
They are nothing special,they get their own money and they don't need extra money just because it's "socially accepted"