Question about closing threads

[Rhodesia]

I am new to this posting thread thing. Why is it that threads are being closed? Is it the staff that can close anything they want or does someone have to complain? I read the rules and it says you have the right to close anything you want. But there was no bad language and the thread went along with "your" rules. Personally I would like to know what other people have to say about the subject. Once again, just my opinion.