It depends on the congregation, regardless of the sign out front.
I grew up a Methodist. We had our weirdnesses, too. For example, my mom came home from a congregational meeting and told me one woman said that the whole congregation might go to hell because some women wear pants.
One of the things that drew me to the SOFCOC from the Methodist church was that there was no choir. Based upon my experience growing up as a Methodist, I equated "no choir" to "no disputes in the congregation".
It appears what you may be doing is what I did in thinking that only the outfit you know has problems. You came to believe getting weird was only practiced by the SOFCOC. I grew up thinking it was a Methodist thing and maybe a Baptist thing. Not that I ever attended a baptist church, but most folks I knew growing up were baptist and they seemed to get whacky, at times.
The problem is that whoever you meet with, you are meeting with people. Getting weird, whacky and wrong is something everyone can and will do on a routine basis. It isn't a practice cornered by the folks at the local SOFCOC.
So, in answer to the question of the opening thread, it seems to me, yes, some congregations do have it wrong. I don't believe mine does. It's been years since I recall a group of people meeting behind a different sign getting ripped from our pulpit. What is normally preached is the grace of God through Christ. Like the old song goes, our hope is built on nothing less than Jesus' blood and righteousness. It isn't built on what we find wrong with others, so we don't spend our time looking for the faults. We preach who can forgive faults and what appears to be the right way.
It seems a good thing to search the scriptures and to try to obey what they teach. There are some who climb such a lofty peak only to take a swan dive on the rocks below by believing that if they do church right, then that's why they are saved and if they don't do it right, then they aren't saved. To me, that's a different gospel.