When I’m online, it does not mean I’m in front of my computer.
When you message me, it does not mean I owe you a reply.
When I’m in busy mode, it does mean that I’m unavailable for everything except, maybe for causal chats.
I do not need to entertain you for your question bombarding because you do not pay me to problem-solve for you. Even if it is just a simple straightforward question, it costs more than just my inspiration or momentum of work.
Do not force me to go against my principle to use the “invisible” mode, or perhaps, block you to be fair to other friends.
Do not do what you do not want people to do to you.