Not really. People say stupid things about people of other areas/ethnic groups. To keep repeating them, even in a lighter entertaining vein is never a good idea.. The most famous saying about the people of Potohar goes like:
Zameen hamwar nahi
Mosam ka eitabar nahi
Shajar phaldar nahi
Aurat wafadar nahi
One can say that it is a joke .. But in reality it's not.. It's insulting the people of an entire region. Similarly, Sheikh Saadi said that even there are very few men left in the world, never trust a badzaat Kashmiri. Similar things are said about almost every region and ethnic group of Pakistan. It's never a good idea to spread online hatred