I get most of my information from the TRMA and the work of their trustees. Unlike what mvsmith had described, these experts don't argue over who's right, but rather spend more time finding new information on Titanic and her sisters, or giving answers to those who have questions.
The average topic is usually a picture, leaving the TRMA Trustees and other knowledgable members of the community to weigh odds and evidence as to what it means. One of the more recent finds being that the railing on the roof of the 2nd class staircase at the boat deck was not continuous (like in the game), but actually stopped against the two vents in the back, with a short segment between them.
That got a little off-track, but the point is that they rarely argue because the knowledge shared there becomes known by the community.