"Don't ..." vs "Don't you ..."

[TomKQT]

Hello,
I'm curious - is there any difference in meaning, grammatical correctness or "feeling" in these two forms of imperative:

Don't do that again!
Don't you do that again!

Thank you in advance.
Tom

 

[indonesia]

Don't do that again!
Don't you do that again!

I don't think there is any difference between the 2 sentences you gave to be honest.
The speaker and listener(s) would know who the command was aimed at, so the pronoun (in this case 'you') is often omitted as it is so obvious.

 

[rlfwood]

To my ear, at least, the second version is a little more emphatic.

Strong: Don't do that again!
Stronger: Don't you do that again!
Strongest: Don't you dare do that again!