I suppose in an ideal world this sub would be for advice, build information and the like but like all forums, Frontier's are far from an 'ideal world'.
The kind of things that some are agitating to 'keep off their lawn' in this sub are self inflicted wounds to be honest. If your true desire is to limit this sub to advice and information sharing then steer clear of provocative threads and postings yourself. Let's be honest here, if you are posting using terms like 'carebear', 'forumdad' or 'coward', (and many more besides), you are trying, to a greater or lesser degree, to illicit a response from those you are wishing to keep away from this sub. The same goes for some of the suggestions, if you are suggesting taking areas of the game away from a portion of the playerbase you really shouldn't be surprised when some of those folks ride in here and go 'hold on a bloody minute'.
Of course the insults roll both ways, so again, if someone rolls in here calling 'griefer' or 'psycho' then the post should be reported if it indeed warrants such action, what usually happens instead though is a mudslinging match is formed and those that some think shouldn't post here are almost invited/tempted back in.
As for the pinning of some threads, I think that is a great idea, the problem with many of the more informative videos and the like though is their suitability under current forum rules. Maybe some of the video makers could create 'clean' versions of said videos that would/could be possible to pin here.