Use of "ditto"

[Our Tort System]

Hi,

Is it common practice among native speakers to respond to, for example, "have a nice day" with this word: "ditto"?

Thanks!
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If it's not easy, don't do it!
That's how I got where I am.

[Mister Micawber]

Oh, it used to be, at least – I haven't heard it in years. But it is for quite casual situations. It shows a certain lack of respect otherwise.
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Native English teacher at Mister Micawber's

[Our Tort System]

Interesting,
Thanks for laying this out for me!
_________________
If it's not easy, don't do it!
That's how I got where I am.