I have been a member here for a few years and read regularly what's posted here, and some members have made great contributions whereas others are only busy with bickering about sunni shia and mainstream Muslims but on the whole there is no feeling of a Ummah here.
I do not believe in collecting ahadith to explain to non muslims what is wrong with mainstream Islam. Instead I say my understanding of Islam is only based on the Qur'an and, rather than throwing mud on others, I try to live by it and try to give a good example of what is Islam and I hope I have left some good example for others to follow.
Only the other day we were served by a young man in a shop, and his humbleness and manners and drew us to him though we did not talk more then jazaklallh khair. His gentle vibes made me question why I never feel connected with many on this forum despite all of us agreeing to follow Qur'an only.
I want you to ask one question why is it that this forum has failed to project brotherhood and good vibes and why do I and many others feel more connected to the likes of the one in the shop who, for all I know, may be following hadith?
I think it's a few things. For one, interacting in the flesh enables much richer, denser communication than text-and-smilies forum posting.
Then there's this forum and its "vibe". I think this site harbors more than a few very opinionated people who don't seem to quite "get it", and who aggressively promote ideas that are unfounded or incorrect in one way or another. This spreads bad vibes.
As I understand it, the actual Ummah is populated by the worthy exclusively, and that kind of worth is determined by God, not by who posts on some internet message board. This doesn't mean this site is useless, it just means that you as a reader need to figure out which posts to consider and which to ignore. After all, there are great treasures of wisdom and truth among all the madness here!
God willing, may you have more Ummah in your life.