Got scolding from a scavenger for showing sympathy

I was at Holland Village hawker centre after school for my dinner when I saw a scavenger, in her seventies or eighties, walking around collecting aluminium drink cans and eating leftover food left behind by diners.

She sat just in front of me, at the same table as me, and finishing up the remaining Char Kway Teow left by someone else. Out of sympathy, I offered to buy her a plate of Char Kway Teow, but what I got in return from her was an extremely ungrateful snort and scolding. She then quickly walked away from my table.

真的是好心没好报。