I know many people have complains. This is a feature included in the boards, for you users to use in order to maintain the integrity of the content. Remember that abusing the report tool will turn into a ban. (reporting continuously without any solid context) In the red arrow, pointing to the right bar there are various small icons, specially one with an exclamation icon (!). Press the icon and it will link you to the report tool where you can input the message you want. (It's the one I stroked with blue) This will really help us a lot as you are also contributing on maintaining the forums clean. Note that all posts reported are kept in private, same with the resolution we take.