I've read or heard that most types of snake venom are large, fragile proteins that are quickly broken down or neutralized by stomach acids and/or cooking. And most are only dangerous if they can enter the blood stream or are injected directly into body tissues.

In practice, there are lots of variables that come into play that might allow ingested venom to get into your bloodstream while still active, such as cuts/abrasions/sores in the mouth or ulcers in the lining of your digestive system.

So, in summary, it's terribly risky.