The answer is, it depends on the type of casing used. Some casings, like those made from natural animal products, are completely edible and can even add a bit of flavor to the sausage. On the other hand, synthetic casings are not meant to be eaten and should be removed before consuming.
Think of it like eating a corn on the cob - you wouldn't eat the husk, right? It's similar with summer sausage casings. If you're not sure what type of casing is used, it's always best to check with the manufacturer or ask your butcher. They can give you the lowdown on whether the casing is edible or not.
Now, you might be wondering why it matters whether the casing is edible or not. Well, for one, it can affect the texture and flavor of the sausage. Some people might find that eating the casing adds a nice crunch or chewiness to the sausage, while others might prefer to skip it. It's all about personal preference, really.
Sausage Casing In Trinidad at Jorge Dotson blog
Another reason to care about sausage casings is food safety. If you're not sure whether the casing is edible, it's always better to err on the side of caution and remove it. You don't want to risk eating something that might not agree with you, especially during outdoor gatherings where food can be left out for a while.