To everyone who calls others hackers: I will not mix with this, whether he does/doesn't hack. If you do believe that he hacks, you will need proof that consists of true screenshots, videos, and/or true trustworthy witnesses, etc. It is no point challenging each other here and accusing each other of hacking, because they are just words. The Moderators need to see concrete proof. If you/another person have/has proof of another person hacking, you/they should report them under the In-Game Support section of Report - Report a player, and attach a file that includes the evidence. @MCheng, that is not true that if everyone calls someone a hacker, it means that they probably hack. It may not be true. For example, if someone pvps and kills many people, that may not mean that he hacks just because someone else calls them a hacker. Perhaps he has many notch apples, pvp skills, etc. There are different factors that affect the result of the pvp, etc. (Competition). Again, if anyone here has evidence, do make a report on the Forums. There is really, fundamentally no point in accusing others of hacking without showing evidence.
