But end users generally don't know and have no way of knowing what technology is inside a product. That seems pretty sketchy. While it's true that unintentional

But end users generally don't know and have no way of knowing what technology is inside a product. That seems pretty sketchy. While it's true that unintentionally infringing on a patent is not an excuse, if I'm liable for someone else's infringing without my knowledge my potential liability is completely unlimited.