[berdario]

> That being said, Facebook does let you chat via Jabber.

Facebook planned to shut down that service since 2015/04/30, and in my experience they actually did it around 2015/07/12

I'm puzzled as how you haven't realized it... I guess that the xmpp endpoint might still be working for some users?

https://developers.facebook.com/docs/chat

Approaching that event, I warned friends to stop contacting me on Facebook, since I would stop checking its messages. (all of my email/phone/chat contacts are available in my about page, so it wouldn't be difficult for people to adapt)

The problem is that there's no way to disable the chat, so people wouldn't mistakenly use it to contact me. And since I still use the facebook web page somewhat regularly, I wanted to avoid falling into the trap of using actively another walled chat protocol. My kludgy solution was to go and "mute" every single conversation I had in the last year. It basically never happens that new people write me on Facebook, and this way I can still check the messages once in a while, but de-facto I'm not actively using their chat service anymore, thus hopefully not contributing to the network effect.