Although, the likelihood of getting stung by a hornet is relatively small, when they do decide to attack, it can be fatal. The main reason a hornet’s sting is so deadly compared to other stinging insects is due to the sheer size of a hornet. Generally, hornet venom isn’t considered that toxic to humans (unless you’re allergic) , but due to their size, the amount of venom they release per sting can be harmful. Hornets release more venom per sting than any other stinging insect.