What happened: Macdonald gathered about 100 fan-posted Broncos camp posts from social media to study Denver ahead of the matchup. Sean Payton learned of the effort and threatened to accuse Seattle of a spygate-type violation.

Why it matters: The dispute shows open practices can feed directly into opponent prep through public posts. It also adds edge to a Denver-Seattle meeting shaped by staff distrust.

What to watch: Watch whether Denver tightens access to open practices and whether the league addresses use of public practice posts.