Is this still common with people?

So I came back to pH yesterday.. (Saturday) my niece's dedication is today.. So I helped around in the house.
After everything, since I havn't seen my home boys for so long..we decided to go to d mall and grab one or two, u know.
We got there. My man bought what he wanted.. I was good tho.. So I didn't buy anything.. We chilled.. Next thing I Know .. We saw dis fine lady.. She was talking with a boy.. We over heard.... "I live at old GRA" my boys was like bro.. She is A1.
I told them to not conclude already.. So when she was about going home.. One of my nigga decided to stalk her.. So we followed.. Bro wer she headed was a different thing.. We decided to slow down.. Btw we parked around the mall.. So after a long walk.. Lol bro you won't believe d place dis lady entered.. My entire life I havnt seen such crowdy area.. And d kids there was yelling.. Anti kewe don come!!!
Obviously she lived there.. And that place is nothing close to old GRA.

NOW MY QUESTION IS; why do some people do this?