you should take a closer look at "spaghettiKYS", it looks like this user used pvp hacks like killaura, anti-knockback, speed or aimbot. please have a look at this player in hardcore survival, hackers ruins the game...
Try using the in-game command ./report when you find a hacker, if you can't record/etc him and report it on the forum. Also, for future notice: http://itsjerryandharry.com/forums/report-abuse.15/ That's the link to report players, if you want. Make sure to read the format, by the way.
Also remember to add evidence (also in the format given), for no action will be able to be taken if there is no sufficient evidence.
Look At this and see the ign L4NE hacking in a survival games game. As you see in chat someone else calls her out for hacking. So im not the only one that has seen this with this player. Please make your best decision.
If you have a report, then record the hacker, and upload it to the report section of forums. You must also give your username, the hacker's username, and a detailed description of what hacks that you suspect that they're using. Here's the link to the reports section if you need it: http://itsjerryandharry.com/forums/report-abuse.15/