You shouldn't ignore homeless people.
Amy had to walk by a small group of homeless people begging for money on her way to work every morning.
Amy  doesn't want to give the homeless people any money.
Amy explains to the homeless people that she sadly doesn't have any extra money, and they warn her that the subway isn't working that morning.
Amy turns up the volume on her music, so she can't hear what the homeless people are saying to her.
Amy is able to catch a bus and get to work on time thanks to the homeless people telling her about the subway shutdown.
Amy doesn't hear the homeless people warn her about the broken fire hydrant, and she gets soaked by water from the hydrant.