Backdoored images downloaded from DockerHub 5 million times https://arstechnica.com/information-technology/2018/06/backdoored-images-downloaded-5-million-times-finally-removed-from-docker-hub/ https://kromtech.com/blog/security-center/cryptojacking-invades-cloud-how-modern-containerization-trend-is-exploited-by-attackers

Malware installed through DockerHub can also escape the container, so may continue to run.

Friends don't let friends install unreproducible black box container images.