Okay then no, I do not believe that this is ethical. If I were to own a cobra (actually one of the easiest snakes to tame) I would take the risk and have some antivenom handy instead of buying a mutilated animal. To do so is to encourage them to continue mutilating these cobras.
Might want to do some serious research there...It's all not quite that easy including the anti venom...
1.0 Normal
1.0 Spider
0.1 Pastel
0.1 Pinstripe
0.1 Mojave