Introduction: Seasonal migrant labour sustains much of Southern European agriculture, yet harvest campaigns often depend on severe housing exclusion. In DOCa Rioja (Spain), the 2024 grape harvest exposed the intersection of homelessness, irregular status and criminal labour exploitation. This study analyses "Operation Espasmo" (Villamediana de Iregua, October 2024) to examine how coercive accommodation arrangements can enable exploitation in seasonal labour markets.

Methods: We conducted a qualitative case study combining the documentary analysis of publicly available sources (official communications regarding the police operation, third-sector materials and press reporting) with three informal first-hand testimonies collected from Villamediana residents to contextualise local patterns of overcrowded housing during harvest seasons. The analysis is framed by the FEANTSA/ETHOS typology of housing exclusion and by Loic Wacquant's account of the punitive management of poverty, focusing on how legal vulnerability and residential insecurity increase dependence and reduce effective access to protection mechanisms.

Results: The operation uncovered around 60 male workers (at least 15 in an irregular administrative situation) living in an illegally occupied property lacking basic habitability conditions. Housing functioned as a control device: workers reportedly paid EUR 120-140 per month for mattress space and additional charges (e.g., transport to vineyards) while working long days and facing wage deductions by intermediaries. The case also involved intimidation and severe violence, including the reported assault and running over of a worker who resisted a pay cut.

Conclusions: The Villamediana case suggests that homelessness in seasonal agriculture is not merely incidental but can become functional to exploitation. Prevention requires complementing reactive raids with coordinated labour inspection, enforceable accommodation standards and rights-based protection for workers regardless of administrative status.