Complaints
A complaint reaches the people who run the site directly.
How to complain
Contact is through the site: sign in and report it on the Bugs page of the project involved, which reaches its owner and us. Say what happened, when, and what you would like done.
You will get an answer. If something takes a while, you will be told that rather than left waiting.
A message or a project
Use the report button on the message, or open a report on the project. A message reported by enough people is hidden straight away, and an administrator looks at it afterwards.
Something that should not be published
If code here breaks your copyright, or a page carries something that should not be there, say so and name the project and the file. Content that should not be here is removed.
If you are still not happy
Say so again and it will be looked at a second time by the same person, who is the only person there is. Nothing about this site pretends to be bigger than it is.