If you decide to not to spend too much for tipping or pitying people on the street, I recommend that you stay away from the pineapple lady. People in Hanoi knew that westerners can't resist poverty and over friendliness, and even if you did not buy the pineapple from her, taking picture of her can drag into a sale (which I mistakenly did) which you will be asked to pay a tip. For the street smart Malaysian, of course I managed to escape that. Well pineapple lady, you should be tipped by carrying those pineapples to the pineapple cake factory, selling pineapple to me is distorting the scene of the Hanoi's normal living life.