Parts:
1- Xbox Forums Reports
2- Report Phishing
3- Report Inappropriate/Offensive Usernames
4- Reporting Users from XBL
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1. Xbox Forums Reports
Now this is a bit more complicated than the other types of reports. When you are making a report try to be as descriptive as you can in the title, and add the minor details in the post. If it is a single post in which you are reporting you don't have to paste what the user said inside your report. Also, the mods will automatically be linked to the thread, so you don't have to include one in the report.
A good report
Title of Report: Attacking other users - Multiple posters involved
Post: After the second page it becomes just a big flamefest (check pages 3 and 5 for the worst).
The post explains that there's more than one user making the offending posts, and describes where those posts are located in a multi-page thread. This will help out the mods a great deal, and give them more time to take care of other reports.
A bad report
Title of Report: Spamming
Post: :(
This report makes it harder on the mods. The thread may already have been reported, but they still have to open up the thread to find that out. A title/post such as "Spamming" could mean many things from one user spamming the forum, to the whole thread consisting of spam. Changing the smiley to a description of your title would have made the report a bit better.
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Now after you have made your report please do not:
-Go back in the thread and post items such as "reported" or the lock icon.
-Quote a user that created an offending post. Your post will have to be deleted along with his if you do.
It's best just to stay clear of any of the bad posts.
2. Report Phishing sites
You can report phishing sites on all browers using this link (same as FireFox's report system).
You can also report through IE7 using the following steps:
1. Open the site, but do not fill out any fields
2. Click on Tools>Phishing Filter>Report This Website
3. You will now be brought to a Microsoft safe-site. Select the language you speak, check the box, and hit "ok".
4. You will then have to fill out a verification box, and will be given you confirmation code.
That's it, but make sure that the site in which you are reporting is not a Microsoft or another known site which does infact use Windows Live ID(Like Bungie.net)
3. Report Inappropriate/Offensive Usernames
Currently there are two ways to report an offensive/inappropriate username:
1. You can report it through your console. Just click on the players name from your recently played list, and file a complaint on their profile.
2. You can go this page on zune.com: http://social.zune.net/reportabuse.aspx
Now, you must sign in with your live ID in order to file the report, and as of now it is only for users in the United States and Canada.
Supposedly they are working on a system similar to Zune's for the xbox.com users.
4. Reporting users from Xbox Live
Yes we know there is a team of people that manage xbox related issues, but we don't want to spam their inboxes. You'll have to report through your console using the "File Complaint" feature. Action may or may not be taken and will not be immediate, so it would be best to just mute the player and/or block communications.
Don't lie about your report either. Someone may have beaten you badly in a game, but that is no reason to file a complaint on them, and you are just causing a hassle for the team.
Last thing on this subject: The rep system doesn't contribute to a ban. It's just there mainly to scare users, so don't fret if someone gave you bad feedback, or you're reaching 100%.
This post is provided "as-is" and confers no rights.