The whole issue is that with "hi", the intent is entirely unknown to the recipient. The sender should signal their intent such that anyone responding knows roug

The whole issue is that with "hi", the intent is entirely unknown to the recipient. The sender should signal their intent such that anyone responding knows roughly what they're getting into. It can be as simple as "hi, free to chat for ~N mins about X?" but anything more that just a greeting is better than none. That's the "educational" value of the post as far as I see it, and I totally agree with it.