Unless they've all changed recently, I used to come across loads of non league clubs linking to their unofficial forums. The first one I checked just now - Maidstone's official radio channel - still does it:Really not sure they do anymore but there may be the odd exception. Not having a go at all but the forum would probably need to be sanitised a fair bit, rightly or wrongly, for it to be considered.
Stones Live! is the official radio station of Maidstone United Football Club. » Links
Any club asking an unofficial fans' forum to 'sanitise' their content, frankly, gone a bit up their arses, IMO.