sorry for the last two spams. Believe it or not, I fell asleep last night, during typing an answer and somehow managed to send twice a message ;) People should not take there smartphones to bed.
Sounds dangerous to me. I often place init.el files into
sub-directories which require project specific customization. You may
also want to look at (info "(elisp)Directory Local Variables") for
adding setting based on the working directory.
Why does this sound dangerous. Encrypted babel blocks could not be modified and even not been read without user authentication. Furthermore, even if I use a org-file from someone else, I would have to authorize the execution by decryption of the block. Thus, its unlikely someone executes something by accident.
Beside of the autostart, encrypted source code blocks might make sens too, if sensitive data might be part of the block. E.g. username and login credentials to login into a certain service.
I do not want to hijack this thread. It was just an idea which sounded to me rather easy to implement, since the core features are all there already.
Feel free, to set it on the crazy ideas list, if you feel that it is not a good idea ;)