Yes, the mammoth wasp can be dangerous. They are known for their large size and powerful stingers, which can cause pain, swelling, and even allergic reactions in some people. However, mammoth wasps are not typically aggressive toward humans and will only sting if they feel threatened or provoked. It is important to exercise caution around these insects and avoid disturbing their nests or habitats. If you encounter a mammoth wasp, it is best to move away slowly and give them plenty of space.