Earlier quoted context omitted.
Have you considered just using FB messenger @ messenger.com? You can log in with your email address instead of your Facebook account. You can also use it while your Facebook account is deactivated (I deactivated mine). No news feed, no ads, just conversations. Not associated with Facebook, just a happy Messenger user.
Not really, because I have an ideological aversion to closed off / walled-garden protocols like that. Part of what my switch away from the whole FB/Twitter/Etc. thing is going to be going back to mainly using XMPP for chat. And anybody who can't, or won't, join an XMPP network and use an XMPP client is somebody I don't need to chat with.
I don't ever want to be the guy who's not there for his friends, and I don't want to be the guy who regretted not staying in touch with his friends on his deathbed. I think that's a good reason to use Facebook, as good as any. Just offering my two cents!