A screenshot freezes a moment forever and gets the context wrong just as permanently.

A screenshot keeps the words and throws away everything that made them mean what they meant: the joke before, the tone, who was upset, what got said back. Then it travels without any of that. What looks like evidence is really a fragment with the edges cut off. People have been judged for years on fifteen seconds of a longer conversation.

Before you send one on, ask what is not in the frame. If someone shows you one, treat it as a piece of the story rather than the story, and ask the person in it what happened.