NFL, Bills have to be aggressive in disciplining Aaron Kromer

At a time when the NFL has become more aggressive than ever in disciplining players for off-field conduct, all players (and plenty of others) will be watching what the NFL does with Bills offensive line coach Aaron Kromer, who is accused of punching a minor in the face during a beach-chair dispute and then threatening to kill the boy’s family if he told police about it.

The allegations are more than enough to justify an immediate investigation by the NFL. If Kromer eventually faces formal charges, he needs to be placed on paid leave by the league — and possibly fired for cause by the Bills, which would cut off his right to ongoing payments. Even without formal charges, the NFL has shown…