Misinformation is "sticky" in nature, requiring a considerable effort to undo its influence. One such effort is debunking or exposing the falsity of information. As an abundance of misinformation is on social media, platforms do bear some debunking responsibility in order to preserve their trustworthiness as information providers. A subject of interpretation, platforms poorly meet this responsibility and allow dangerous health misinformation to influence many of their users. This open route to harm did not sit well with health professional users, who recently decided to take the debunking into their own hands. To study this individual debunking effort - which we call 'Debunk-It-Yourself (DIY)' - we conducted an exploratory survey n=14 health professionals who wage a misinformation counter-influence campaign through videos on TikTok. We focused on two topics, nutrition and mental health, which are the ones most often subjected to misinformation on the platform. Our thematic analysis reveals that the counterinfluence follows a common process of initiation, selection, creation, and "stitching" or duetting a debunking video with a misinformation video. The 'Debunk-It-Yourself' effort was underpinned by three unique aspects: (i) it targets trending misinformation claims perceived to be of direct harm to people's health; (ii) it offers a symmetric response to the misinformation; and (iii) it is strictly based on scientific evidence and claimed clinical experience. Contrasting the 'Debunk-It-Yourself' effort with the one TikTok and other platforms (reluctantly) put in moderation, we offer recommendations for a structured response against the misinformation's influence by the users themselves.

翻译：错误信息具有“黏性”本质，消除其影响需要付出相当大的努力。辟谣或揭露信息的虚假性便是此类努力之一。鉴于社交媒体上充斥着大量错误信息，平台确实承担着一定的辟谣责任，以维护其作为信息提供者的可信度。然而，由于责任界定存在解释空间，平台未能充分履行这一职责，致使危险的健康错误信息影响了众多用户。这种开放的危害途径令健康专业人士用户深感不安，他们近期决定亲自承担起辟谣工作。为研究这种个体辟谣努力——我们称之为“自行辟谣”——我们对14位通过TikTok视频开展错误信息反影响力活动的健康专业人士进行了探索性调查。我们聚焦于营养与心理健康这两个在平台上最常出现错误信息的主题。我们的主题分析表明，这种反影响力活动遵循一个共同的流程：启动、选择、创作，并通过“缝合”或“二重唱”功能将辟谣视频与错误信息视频结合。“自行辟谣”努力建立在三个独特方面之上：(i) 它针对被认为直接危害人们健康的流行错误信息主张；(ii) 它对错误信息提供对称性回应；(iii) 它严格基于科学证据和声称的临床经验。通过对比“自行辟谣”努力与TikTok及其他平台（不情愿地）投入的审核工作，我们为用户自身构建结构化应对错误信息影响的策略提出了建议。