It will never change, as sure as night is day.
Mountain biking attracts a laddish set who are into kit, beer and swearing, and come here with the intent of winding folk up.
This forum attracts all sorts of people, including some middleclass middle aged women, who like my dear mother are prety easily offended.
The final ingredient is the old salwarts and self appointed police of the forum make so much noise about a potential storm in a tea cup that its blown completely out of proportion.
Removing any one of these groups will help, especially the last one.
Maybe if the chat was split into 3
Lads lounge
Ladies lounge
The rest could **** off to the guardian messageboard