Re: As others here have said
Curiously, the browser on my phone (Android 2.mumble) gets an HTTP 403 Forbidden error for m.facebook.com. As far as I can recall I've never tried to connect to it before, and I checked all the relevant settings.
I refused to update the app for the same reason - I don't like the amount of permissions it is asking for.
Ditto, though I also begrudge its resource consumption.
I don't post to Facebook myself (or only extremely rarely), but my family members use it often, and people insist on using it to invite me to events, so occasionally it'd be handy to be able to check it from my phone. But I've survived without it this long.