Could a person survive by just eating heinz beans for 3 years?!

Yes, you could survive.
You would probably suffer from a number of nutritional deficiencies, though.

Heinz beans has liquid in the can, so that part is a good thing. Cans have a shelf life though, after that could give you botulism and you'd eventually die in a few months. Dried beans would be a better bet for the long term but you'd have to find drinking water and a means for heating them. Along with that you might want to toss into the pot some dangelion greens (preferably the tender leaves) and some flower petals (only from certain plants or else they could be poisonous...read up on "edible flowers". I know nastursums and geranium flowers are edible) and cook that up, maybe find some roots and onions (read up on what you can take from the ground so you won't poison yourself...I mean like daffodill bulbs might be poisonous, dumb cane plants are poisonous, etc.). But, you'd need 2 kinds of beans (canned and dry).

Well you can you will just be sick after 3 months keep throwing up and poison your self be extremely weak but survive
Most baked beans have pork in it so you will get your protien but it has alot if sugar and vinegar so you will end up getting fat and breath bad

It's possible but an unnecessary question. If there is a zombie apocalypse (which there probably will be) the best thing to do would be to resort to cannibalism.

Definatly not! Lol you wouldn't get any protein or energy. See a nutritionist! But I know baked beans are yummy.

I had the same delema thinking i could live off two minute noodles.

Not possible if water is not provided but can survive if beans and water.

Survive yes probably but with a horrendous stomach ache.

Imfao! No way! You need nutrition etc. etc. Bahahahhaah!

No.

no you would die from your own farts.

go for dried fruit instead!