No but I don't think it should be a requirement. Barely anyone does it here.
I was so shocked at how some members reacted in that Keyshia Cole thread.
My dad always tips if the service is great but he doesn't and shouldn't have to, especially if the service is bad. If you're a customer you shouldn't HAVE to pay a server's wages, what annoys me is how people get so outraged if you don't tip 15% or more when they should happy they're getting a tip in the first place.
Americans stay being a mess.