This document summarizes some tactics brands use for ambush marketing during sporting events like March Madness, as well as the legal risks of those tactics. It discusses avoiding use of trademarks, giving away tickets or gifts to attendees, using disclaimers, and sponsoring athletes. However, it notes that while these may avoid directly using trademarks, they do not ensure a brand is clear of risks like confusing consumers or violating a sanctioning body's policies. Sponsoring athletes in particular can result in penalties for the athlete from groups like the IOC.