"TikTok, Do Your Thing": User Reactions to Social Surveillance in the Public Sphere

''TikTok, Do Your Thing'' is a viral trend where users attempt to identify strangers they see in public via information crowd-sourcing. The trend started as early as 2021 and users typically engage with it for romantic purposes (similar to a ''Missed Connections'' personal advertisement). This practice includes acts of surveillance and identification in the public sphere, although by peers rather than governments or corporations. To understand users' reactions to this trend we conducted a qualitative analysis of 60 TikTok videos and 1,901 user comments. Of the 60 videos reviewed, we find 19 individuals were successfully identified. We also find that while there were comments expressing disapproval (n=310), more than double the number expressed support (n=883). Supportive comments demonstrated genuine interest and empathy, reflecting evolving conceptions of community and algorithmic engagement. On the other hand, disapproving comments highlighted concerns about inappropriate relationships, stalking, consent, and gendered double standards. We discuss these insights in relation to the normalization of interpersonal surveillance, online stalking, and as an evolution of social surveillance to offer a new perspective on user perceptions surrounding interpersonal surveillance and identification in the public sphere.