Airlines are tightening their carry-on rules. Here's how passengers can fight back.

Revenue-hungry air carriers are coming for your backpacks and briefcases. Don't let them.

Are airlines tightening their carry-on luggage rules? Passengers like Eddie Cannon believe the answer is "yes."

Cannon was flying from St. Louis to Atlanta on Delta Air Lines when a flight attendant ordered him to store his carry-on bag under the seat in front of him.

"I didn’t have room for my feet," he says.

Instead, he tried to place his bag in the over…