Internet adage mandating that "If you comment on my post, you must react to it through the various Facebook 'reaction' options, i.e. 'Like' or 'Frown.'" The idea behind Lane's Law is that if you are contributing to the conversation on a topic, you have an obligation to help boost the post's visibility.
Enforced at will; an idea stemming from the belief that a man's wall is his castle.
The rule is simple. If you comment on my shit, you have to react. Lane's Law.