[Closed] Why do threads on here get locked?

Is there a specific code of conduct that users are expected to follow? The only one i can find ([url= http://singletrackworld.com/forum/topic/our-forum ]here[/url]) states thus:

The ethos of this forum must be one of mutual respect for everyone who uses it. You may argue and debate with anyone but when the argument becomes heated or abuse begins to creep in, then you will have crossed the line. If you don't step back from it then you will likely be moderated.

Respect for everyone is paramount. If we see evidence or have good reason to believe that you are looking to get a rise or to deliberately force a reaction from any other users (Trolling) then we will stop you.

If you are here to chat, respectfully debate issues or ask genuine questions of the thousands of users who come here then you are welcome to stay and we have no doubts you will add positively to our huge community.

I only ask since a [url= http://singletrackworld.com/forum/topic/its-rachel-friday-seen-as-shes-single-again ]recent thread about Rachel Reiley[/url] was locked within 40 minutes, where nobody violated the guidance given above (in my opinion). I don't even think the thread could be seen as sexist.

Have i missed something?