What do people mean by "Please don't quote?"

[Southie]

Re: What do people mean by “Please don’t quote?”

@Theorist

It is weird. Southie is usually very careful when he is even joking around. Don’t know what happened but his comment just rubbed me the wrong way. Something seems very insulting about his comment. Maybe Southie can explain?

You talkin to me?
You talkin to ME?