My proposal is simple. A preference in account settings, below the xtal nag preference. This turns a 'Are you sure you want to buy this ally' y/n dialogue box on or off. This way, you can turn it off for volleying, but the rest of the time you can turn it on so you don't accidentally buy some noob you are stripping. I have done it, maybe 5 or 6 times over the last couple of years, I know I am not the only one. :/
Support, I've done the accident buy too many times to count.. Fat fingering that hire button is defo a curse