It's not that we don't condone sharing/account use with full permission, it's more the fact that blizzard can and probably will ban one/both accounts because of it if you're ever reported; it's more an issue for your own protection :p

I personally prefer & use keyclone as it's setup right off the bat and easy to configure + quick help if you need it usually; though if you don't wanna go for 2 copies, Octopus is probably the next best choice, I hear good things about it from others and there's probably enough users of it here that you might get help if you run into an issue.