CONTENT WARNING: This paper discusses image-based sexual abuse. Technological advances in Artificial Intelligence (AI) have made it easy to generate and distribute Non-Consensual Synthetic Intimate Imagery (NCSII); images and videos that depict people’s voices, faces, or bodies in intimate or sexually explicit scenarios. The creation and distribution of NCSII is a form of image-based sexual abuse that primarily affects marginalized people. We present Photo BOO-th, an interactive installation that invites attendees to encounter NCSII of themselves, resulting in a creepy, visceral, and affective experience. We designed Photo BOO-th to critique, raise awareness, and foster societal discussions around consent, image-based sexual abuse, and the role of technology in enabling harm. Following a Research through Design approach, we unpack design events that reveal some of the tensions and considerations in designing Photo BOO-th. We conclude with a discussion around designing creepy interactions in sensitive contexts, designing with and against the uncertainties in generative AI, and a reflection on vulnerability when designing creepy interactions.