The IFB churches who worship in darkness are primarily in the South, though they have attempted to spread to the four corners of the country. The several dozen that I am personally familiar with would all fall under the heading of "religious wacko's". Having said that, I did live in Pennsylvania for three years, and found the Independent Baptist in the area to be a breath of fresh air. I think each person's point or view depends upon the part of the country in which we live.
The IFB's in our area are as blinded & cultish as any unchristian religion you care to name. Anyone's lack experience with these hardened legalists does not negate the fact that they do exist & that they exist in great numbers. Christ & Paul attacked the Pharisees & their false doctrine without apology & without fear; some of us will follow their example & expose the dangers of the Pharisees of our day.
Have any examples?
I live in Jacksonville, Florida. There are a plethora of IFB churches in this city. I've visited or know someone that attends many of them. I've only found one that I would consider legalistic. I'll call it out, it's First Conservative Baptist Church.