According to The List website, YouTube performer Riceman once did a social experiment: He told people his brother was missing to see how they would react.

He saw a homeless man standing on a corner, holding up a sign reading: "U.S. Vet in need, please help." Riceman gave the man some change, told him his brother was missing, and  gave him a flyer with his brother's picture.

Instead of holding up his own sign to passing cars, the homeless vet held up the sign with Riceman’s missing brother on it.

When Riceman returned, he told the homeless man about the experiment and asked him why he chose to hold up the missing person’s sign rather than asking for money.

The man replied, "What kind of person would I be if I didn't help someone else?"