Canned goods from subs sunk during WW2 have been found to have no harmful bacteria in them when opened.
Granted its a cold environment; but the canned goods held up to the pressure.
I've drank beer which sat in a Wisconsin unheated garage for three years. The beer definitely had a metallic taste and it tasted like crap (then again, does Miller taste good even when fresh?) but I didn't get sick at all. However, I only had one.
Canned goods will last a very long time.
Now when asked when I think things will change I answer "The next time Thomas (aka the fed) robs Peter (aka the 53%) to pay Paul (aka the 47%) and Peter pulls a gun...things will change"