Absolutely not, this site is first and foremost an open and friendly community.
Click "Edit Your Profile" and at the bottom there is a button to delete your profile.
No, if you want to change your username then you must delete your account and create a new one under the new name.
If you are having issues with another user in chat, feel free to use the mute button conveniently located next to the users name on the user list. Muting removes the user from the chat window allowing you to control who you see and don't see in chat.
The only users that can send you messages and leave you comments are your friends. If you are having issues with a user, simply unfriend them and they will be unable to contiue.
Feel free to submit the faker to our "Fakes of SceneKids.com" tumblr.
Actually, you probably are. Using fake photos can result in your account being flagged as a fake. Use your own photos and you won't run into this "problem".
Brand new users are not permitted access to chat immediately. Feel free to explore the rest of the site, establish some friendships, customize your profile, et cetera. Before you know it, you'll have access to chat.
/me couldn't make grey text, had to look it up in the FAQ
There are rate limits in chat, and they are set fairly liberally. If you exceed the limits you will be logged out of the site. The chat message is limited to 140 characters. If you're having issues, try filling it up instead of being so quick to hit the enter key.
From time to time new changes are pushed to the site that end up breaking the chat room. If the room is active then stops dead, just refresh the page.
Nudity (defined as nipples and/or genitalia) is not allowed and should be reported immediately. Underwear or subjectively, "too much skin" is not considered pornography.