We collected and analyzed Instagram direct messages (DMs) from 173 youth aged 13-21 (including 86 LGBTQ+ youth). We examined youth's risk-flagged social media trace data with their self-reported mental health outcomes to examine how the differing online experiences of LGBTQ+ youth compare with their heterosexual counterparts. We found that LGBTQ+ youth experienced significantly more high-risk online interactions compared to heterosexual youth. LGBTQ+ youth reported overall poorer mental health, with online harassment specifically amplifying Self-Harm and Injury. LGBTQ+ youth's mental well-being linked positively to sexual messages, unlike heterosexual youth. Qualitatively, we found that most of the risk-flagged messages of LGBTQ+ youth were sexually motivated; however, a silver lining was that they sought support for their sexual identity from peers on the platform. The study highlights the importance of tailored online safety and inclusive design for LGBTQ+ youth, with implications for CHI community advancements in fostering a supportive online environments.

翻译：我们收集并分析了173名13-21岁青少年（包括86名LGBTQ+青少年）的Instagram私信数据。通过将青少年带有风险标记的社交媒体痕迹数据与其自我报告的心理健康结果相结合，探究LGBTQ+青少年与异性恋青少年在网络经历方面的差异。研究发现，LGBTQ+青少年遭遇高风险网络互动的频率显著高于异性恋青少年。LGBTQ+青少年整体心理健康状况较差，其中网络骚扰尤其加剧了自伤与伤害行为。与异性恋青少年不同，LGBTQ+青少年的心理健康水平与性相关消息呈正相关。定性分析表明，LGBTQ+青少年被标记为风险的消息大多涉及性动机；但积极的一面是，他们通过该平台从同龄人那里寻求对自身性别身份的支持。本研究凸显了为LGBTQ+青少年定制化网络安全策略与包容性设计的重要性，并对人机交互研究领域构建支持性网络环境具有推动意义。