TY - JOUR AB - Purpose Social media has promoted anti-brand communities, which build around the shared aversion to a specific brand. The purpose of this paper is to investigate social media-based anti-brand communities and their effects on the sports team brand in question.Design/methodology/approach The authors conducted a netnographic study of Facebook-based anti-brand communities that oppose a professional football team.Findings The netnographic study reveals characteristics and drivers of Facebook-based anti-brand communities that oppose a professional football team. The research further identifies co-destructive behaviours of anti-brand community members that harm the sports team brand and even its sponsors. However, the findings also reveal that anti-brand communities may play a positive role in sport, as they strengthen the relationship between fans of the opposed brand and this brand and foster rivalry among football fans.Practical implications This research establishes the relevance of social media-based anti-brand communities for sports brands. Recommendations are made for team sport brands with regards to how to deal with the phenomenon of anti-brand communities.Originality/value While the previous research on anti-brand activism focused on either offline movements or movements using traditional websites, this research is the first to investigate the pivotal role of social networking sites for anti-brand activism. The paper further uncovers unique motivational, attitudinal, and behavioral patterns of fans that meet in communities opposing not only the rival team, but also the brand associated with the team. Findings show ways to better understand and deal with such anti-brand communities in sports. VL - 17 IS - 4 SN - 1464-6668 DO - 10.1108/IJSMS-11-2016-018 UR - https://doi.org/10.1108/IJSMS-11-2016-018 AU - Popp Bastian AU - Germelmann Claas Christian AU - Jung Benjamin PY - 2016 Y1 - 2016/01/01 TI - We love to hate them! Social media-based anti-brand communities in professional football T2 - International Journal of Sports Marketing and Sponsorship PB - Emerald Group Publishing Limited SP - 349 EP - 367 Y2 - 2024/04/24 ER -