I think that is an issue that should clearly be considered and certainly be assigned to a group of engineering specialists. Once again, how are sealers going to react? Obviously, if it is a requirement, sealers will accept it.
The seal hunt has been around for some time. I think it's in people's nature to give enough thought to ways of improving and perfecting a method. I believe the air rifle idea has already been suggested and certainly tested, and hunters reverted to a different method.