We take care of as many as we can, but keep in mind that there are about 600 SG servers alone and only 150 or so moderators. We also have to take care of the other game modes, such as creative, and the other networks, such as the forums and Teamspeak.
If you see a hacker and you would like to report them, we encourage you to do so! Please simply obtain evidence of them hacking by recording them, and report them in the "Report Abuse" section of the forums. Thank you for your concern on this topic.
Thread locked, please feel free to PM me with any further questions.