'There is no
Small shrug of the shoulders
Small feeling nervous
There is no small incivility
Overall, prefer the serenity'
Is how Google translate delivers.
What do you think works best?
I have a sense of what it means.
I say this poster in the booking office of SNCF in Dieppe.
I know in England such posters are more likely to state that aggressive behaviour will lead to prosecution.
If you know the poetry of Jacques Prevert, that this is what it made me thinking of. The English translation needs to be as poetic. I don't think repeating the word 'small' does it for me.