[All Systems Go]

Whilst I don't agree with purposely creating disabled children and would seriously question the mental health of anyone wanting to do so, there are some other considerations.

With the development of genetic engineering (admittedly still some years away) there does seem to be a question of what constitutes a mental or physical abnormality.

The BBC article mentions skin colour as bringing disadvantages, if this is true should this be banned as well? On a less, extreme measure, what about ginger people?

It is also possible (although, how likely I don't know) that banning the creation of such embryos will increase discrimination against those who have such abnormalities. I'm thinking particularly with reference to genetic engineering which (in the US, possibly in the UK) will probably be incredibly expensive. Not only will a disability be seen as a physical deformity, it will also be seen as a social one, which could possibly create another barrier to class mobility.

To take the argument to an Orwellian extreme, what about mental disabilities? Will a tendancy towards compassion be considered abnormal and a barrier to the perfect working of the neo-liberal market?

Purposely having a deaf baby is stupid. If both parents were deaf, then maybe there might be more of an argument in favour of it but in this situation, no.