I’ll eat some out of date stuff that most people won’t touch. Example was lunch today. Two spam and cheese sammiches. Best before February 2013. I had half the can and the pups split the other half.
That being said I don’t buy dented cans, yes I check all of them. If I dent one it gets consumed immediately.
One of the checks for food spoilage is a swollen can. If the can is releasing pressure it won’t bulge. Dents are an area where the integrity of the container is compromised. The crease in the metal will degrade/rust before the rest of the can.
There is a reason why stores will have dented cans discounted. They have are more likely to spoil.
I have no sources to back up my beliefs on this matter other than what I’ve read, my wife, my mom/dad, my mother in law, grand mother/dad, have told me. Some of the during the Great Depression.