There isn't one simple answer to your questions, saulgoldie. What you have to do is feel out each particular situation on its own merits and decide then and there what to do...because each situation is unique. For that, you have to trust your own best instincts and hope they lead you in the right direction.

For one person, one specific response may be the best...but for another, another response. So, you could...

- walk away
- remain silent
- respond in kind
- use violence
- use friendly verbal persuasion
- use threatening verbal persuasion
- use humorous verbal response
- etc.

There IS no one right answer to your question, but there are many possibilities. I always trust my best instincts, and they mostly seem to steer me in the right direction.