This is horribly rampant issue on Reddit. Swaths of comments reduced to three-word dialogues from movies that even most Americans may not have seen. While it might be acceptable in a community specific to that piece of media, it always comes across as lazy everywhere else. A simple link to a relevant clip or snippet would help contextualise the reference, but if commenters were willing to put in that effort, they probably wouldn’t resort to quoting three-word phrases in the first place.