A "hello" means it is "IM urgent" so it can wait for the moment I am OK to exchange.
Like I said, this is also cultural - some cultures allow people to interrupt others, some not.
Re: your messages in this thread
Dear BrandoElFollito:
You're rebuilding TCP over UDP. Chat apps are connectionless (or RESTful, if you will). What makes them productive, especially in the workplace, is the fact that they can work without all the handshaking that accompanies more structured communication like in-person, spoken human conversations.
Nothing is stopping you from adding back all your binds, listens, SYNs, and ACKs to a protocol that doesn't need them. But it's a conversational code smell if you do.
Sincerely yours,
sowbug
That is why hello is annoying. People are capable to talk immediately, but take forever to finish writing.
Sending Hello this way seems like calling somebody and if they answer it's ok to interrupt.
Being responsive doesn't mean you're idle.
If this is to say something minor I will block that person, or never pick up their call again.