Venting is done with the permission of the listener and is a one-shot deal, not a recurring retelling or rumination of negativity.
This statement emphasizes two boundaries of "healthy venting": the other person's consent and avoiding repeated repetition. On social media, the audience is often mixed (classmates, strangers, friends), making it difficult to ascertain who is willing to accept your emotions, thus making it easier to slip into "trauma dumping." Furthermore, "repeatedly retelling/ruminating" only intensifies the emotions, like repeatedly tearing open a wound instead of processing and resolving the problem. Shifting venting from "seeking attention" to "seeking understanding and a way out" often requires a more specific target audience, setting, and frequency.