This is not an error users make. It's an error that Brew makes, as a software: not taking the chance to, you know, work for the user instead of otherwise, as co

This is not an error users make. It's an error that Brew makes, as a software: not taking the chance to, you know, work for the user instead of otherwise, as computing should do. Just ask the user if they want the configuration be automatically applied for them. 99% will say "yes, please" and the rest will be the commenters here who (fairly enough) don't want their init scripts touched by an installer.