NFL commissioner Roger Goodell declared Alosi violated rules by ordering inactive players to form a sideline phalanx that would hinder gunners on punt coverage.
The NFL released a statement that said Alosi "placed players in a prohibited area on the sideline to impede an opposing team's special teams players and gain a competitive advantage. This is both a competitive violation as well as a dangerous tactic."
The $100,000 fine also extends to a broadcast claim Jets special teams coach Mike Westhoff made that the New England Patriots have used a similar ploy.
"Both the NFL Constitution and Bylaws and other league policies require clubs to report actual or suspected violations of competitive rules by other teams only to the league office and not to engage in public criticism of other clubs," the league statement read.
The Jets have been ensnared by a series of embarrassing scandals this year, including Braylon Edwards' DUI arrest, their mistreatment of female sports reporter Ines Sainz that led Jets owner Woody Johnson to fund a league-wide training program to educate players, and last week's report head coach Rex Ryan and his wife had posted foot-fetish videos on the internet.