They had 70 check in a few times during the game specifically so that the D might be confused when it's someone else checking in as eligible in a big moment, like a game winning 2pt conversion. The hope is that the defense just assumes and doesn't pay attention to the announcement. That level of gamesmanship is fine in my opinion.
Where they pushed the rule beyond gamesmanship is sending two guys to the ref, then has 70 approach the ref waving his hands, follows the ref as though he's reporting. The ref assumes he's the one reporting, announces it, and 68 is uncovered because he's not eligible. Even if 68 clearly said it was him reporting and the ref misheard or made an assumption, that's the risk you run with that bullshit. It's a game winning 2 pt conversion on the road, the crowd is loud as fuck, the play clock is moving, and the ref has to get into position in the back of the endzone. The deceit confused the ref in that situation, and the confusion was intentional.
The NFL says the rule is literally to avoid deception on the defense. Campbell says he tried to deceive and is mad that the ref didn't help.
Fuck him, fuck Detroit, and fuck the haters.
https://www.totalprosports.com/nfl/nfl-video-reminding-teams-reporting-eligible-receiver/?fbclid=IwAR372WjWxsY4-h0SgmFQwjSJf3_rPN6G656V84YgFIxp28u38G_zFWHS5oQ