It's not bad to eat tomato skin as the tomato skin is edible.
However tomato skin is not easily digested by your stomach and so it can be hard to digest the tomato skin.
Still the tomato skin does contain a lot of vitamins, minerals and nutrients and when you peel the tomato skin you get rid of those things.
Also the tomato skin is packed full of flavonols which can lower your risk of cancer.
However just don't eat bad tomatoes as they can make you sick.
Bad Tomatoes can indeed make you sick because when tomatoes go bad they can contain bad bacteria.
Eating bad tomatoes that are actually spoiled can cause abdominal pain, stomach cramps, diarrhea, vomiting and even food poisoning.
It's unlikely that the bad tomatoes would kill you but you will fee really terrible if you do consume bad and spoiled tomatoes.
If the tomatoes have gone soft, smell bad or they are changing colors then throw them out.
It's not worth the risk of getting sick from bad tomatoes or other bad food.
Fresh Tomatoes last for about 1 week on the counter and in the refrigerator the fresh tomatoes will last for up to 2 weeks.
Bad Tomatoes will usually grow mold, get wrinkly, soft and sometimes smell bad as well.