We can always throw a legitimate use into the pot.
If you have a limited number of SCART sockets on your television, you could route the signal from a DVD player through the SCART-through on a VCR, but the Macrovision would kick in an affect playback. With this device you could do it, so it could have a legitimate use.
Is that enough to keep the thread alive? After all, I`m sure that could be the only reason why Mike was asking