(CNN) It's happened yet again.

An African-American guest at a Portland hotel says staffers called police on him after he took a phone call in the lobby -- an incident many observers see as another in a dispiriting and all-too-familiar series.

In 2018, police across the United States have been urged to investigate black people for doing all kinds of daily, mundane, noncriminal activities.

This year alone, police have been called on African-Americans for: