I heard someone talk about complaints

Context
I'm a long term care visiting volunteer for the Caddo Council on Aging's Ombudsmen Program for nursing homes, so I get to hear a lot of residents' complaints about the facility I visit. Today, I had occasion to discuss these complaints with a staff member, and she expressed her belief that some people will always have something to complain about and will never be satisfied.

Commentary
I just have one quick thing to say about customer service: the fact that someone always has something to complain about doesn't eradicate our obligation to address the complaints.

What did you hear today?