自 2022 年 ChatGPT 推出后，Reddit 主要版块出现明显 AI 贴文增长趋势。r/AmItheAsshole 拥有超过 2400 万用户，部分版主估计多达 50% 帖文可能经过 AI 全部或部分生成，平台在 2025 年上半年删除超过 4000 万条“垃圾与操纵内容”。相关子版如 r/AITAH（近 700 万成员）也报告类似激增，并视 AI 为潜在生存威胁。用户体验同步恶化，诸如婚礼冲突、座位纠纷等高重复“剧情模板”被视为 AI 套路，导致信任崩坏、参与度下降。
AI 内容难以可靠识别，五位 Reddit 用户各自依赖直觉与非结构化线索，例如标题与正文重复、语法突变、新号发帖、或“诡异的”叙述节奏。缺乏稳定检测工具使判定呈 0% 可靠度，且因 AI 从 Reddit 抓取训练、人类再模仿 AI 表达，已形成“AI 语言反馈循环”。在新闻与政治板块，AI 自动化扩大虚假信息与舆情操纵，使人工版主负担迅速提升，一名 r/Ukraine（近百万用户）前版主形容对抗讯息洪流“如同一人对抗潮浪”。
经济动机亦推动 AI 内容扩散。Reddit 贡献者计划让用户可借由点赞（karma）与奖章套现，促使部分账号以 AI 批量产文后再转售账号或进入 NSFW 板块以导流变现。版主观察到大量以赚取 karma 为目的的策略性发帖，强化平台“游戏化”生态。整体上，生成内容需要极低成本，而辨识与审核则需高成本，形成结构性资源不对称，AI 贴文使社区管理、用户信任与信息真实性均面临加速恶化风险。
Since ChatGPT’s 2022 debut, major Reddit communities have seen a sharp rise in AI-generated posts. r/AmItheAsshole, with more than 24 million members, has moderators estimating that as much as 50% of submissions may be partly or fully AI-written, while the platform removed over 40 million items of “spam and manipulated content” in the first half of 2025. Related subreddits such as r/AITAH (nearly 7 million members) report similar surges and treat AI as an existential threat. User experience has deteriorated as repetitive scenarios—wedding disputes or seating conflicts—signal AI templates, eroding trust and reducing engagement.
AI content is difficult to verify; five Redditors described relying on intuition and unstructured clues such as title-body repetition, abrupt grammar shifts, new accounts, or “uncanny” narrative cadence. With no reliable detection tools, accuracy remains effectively 0%, and an “AI linguistic feedback loop” has emerged as chatbots trained on Reddit influence human writing that then resembles AI. In news and political subs, AI automates disinformation and astroturfing, increasing moderator workload; a former r/Ukraine moderator (close to 1 million members) likened the effort to “one person standing against a tidal wave.”
Economic incentives also drive proliferation. Reddit’s Contributor Program allows monetization through karma and awards, prompting some users to mass-produce AI posts, sell high-karma accounts, or qualify for NSFW subs to promote paid content. Moderators observe widespread “gamification” in which accounts post strategically to farm karma. Overall, generating plausible AI text is low-cost while evaluating it is high-cost, creating structural asymmetry; AI posts now accelerate declines in community governance, user trust, and information authenticity.