[1_player]

I disagree. I think a common antipattern is piping only one thing.

This is good and readable:

    nuclear_missile
    |> open_hatch()
    |> open_fuel_lines()
    |> fire_thrusters(:all)
    |> configure_gps(%Coordinates{...})

This is unnecessary:

    word_count = 
      words
      |> Enum.count()

This is better:

    word_count = Enum.count(words)

Pipes read like a list of bullet points. We can easily deal with up to a dozen bullet points, but a single bullet point is bad grammar style.