How does one define 'lamest'?
Its very obviously a bouncy, since the child described isn't old enough to have devolved to DUmmy thinking through exposure to DUmmies, yet. And because, like the everyday constants we live with such as gravity and the rising and setting of the sun, we know DUmmies use children as props and as moral fulcrum with which to try and leverage (guilt) others into giving in.
But lamest? I don't know that theres a finite scale that Dummy lameness can be measured on.
CMD