Following Russia’s invasion of Ukraine in February 2022, Georgia became a key destination for Russian migrants, who significantly influenced the local housing market. This article explores the impact of the influx of Russian migrants into Tbilisi, which caused a surge in rental prices and aroused feelings of social insecurity among Georgian citizens. Using qualitative methods, including social media analysis and semi-structured interviews, the study investigates the emergence of “informal sanctions” imposed by Georgian Airbnb and Booking.com hosts as a means of expressing political dissatisfaction with their own government and protecting national interests. This article identifies four patterns of informal sanctions, such as rejecting, discomforting, avoiding, and exploiting Russian tenants, which reflect a form of patriotism from below. We argue that these spontaneous, everyday practices of resistance lead to the politicization of mundane host-tenant relations and the collective stereotyping of a migrant group in a time of insecurity. The theoretical proposition here is that everyday nationalism is closely related to informality, which opens the possibility of examining grassroots responses to perceived threats and tactics of resistance, with implications for broader social dynamics in times of ongoing geopolitical conflict and wartime migration in Eastern Europe.