No Bako.com is 100% free!
Go to your profile an on the bottom of the screen there will be a link that says Delete My Profile click that and then confirm and it's gone!
If you want to block someone from messaging you, click on the message an under the send reply box there is a button the say "Block Username" click that then confirm and now that user can't message you anymore.
Just copy and paste the YouTube url into the box in edit your profile.
Example url: https://www.youtube.com/watch?v=AjWfY7SnMBI
Follow these instructions with picture to help.