The usage of foul language is unacceptable. Ever. In whatever situations you're in.
As Tariq Ramadan once said,
Show me how you deal with your problems and I'll show you who you are.
It's the way that we deal with our fury and frustations, that really shows people who we really are.
"Sabar pada pukulan pertama."
And if your respond while tersepak batu pun dah "fuck you", oh well. May Allah guide you.
Note to self: Walk the talk.