It's possible in Polish to use "pan" in vocative "panie" form with strong vocal emphasis not followed by name or last name, to give it more rude sounding - but it won't be an insult.
Yes, true, I've heard that, it's like putting emphasis on the fact that you want someone to pay attention or something like that. A bit like the guy saying 'Sir!' in the Blues Brothers restaurant scene but not quite the same.
There's nothing more humiliating than a Warsaw taxi driver who looks at you as you try to work out how to operate the door handle and says "Panie!" with a left-bank accent.
