A feature where you can appear online ONLY when you join a voice channel revert back to invisible when you leave a voice channel.

I was wondering if there is a method where you can appear online ONLY when you join a voice channel. And, it would revert back to invisible when you leave a voice channel.

I want a way to so that my friends or people I'm uncomfortable around to constantly ask me to do things when I don't want to be bother and yet I don't want them to spam me while I'm in a call that I am invisible. 

Just manually changing the activity status is inconvenient.