Don't let the facebook/twitter post shake your faith. That's exactly what they want it to do. If it shakes your faith and you give up - that's one less voice decrying the endings. If it shakes your faith and you get angry - that's one more voice added to the 'angry mob/easy to call a minority' pile.
Stay civil, stay motivated, keep each other's spirits up. Hold the line. The probability that this would take a relatively long time to get a result was always quite high.
Hold the line!
It's worth pointing out that with that facebook post going up and then being taken down, they win on both fronts. Because the BSN doesn't miss a beat, the people who are posting here are going to be made aware of it, leading to the aforementioned 'losing faith' and because they've taken it down within a very short time span, the public at large aren't going to see those comments attached to a Mass Effect facebook post.
Also, recognise that this isn't really a change of position for them - this whole time they've been telling us that their endings are fine and we've been telling them that they're not. To paraphrase Harbinger: this changes nothing.
Don't let it get to you! Keep doin' what you're doin'! Play the long game!