This will happen in every server. It’s really sad that people wanna hack and ruin the game for others. Personally, it doesn’t matter if staff are always online, it’ll tend to grow. Not much you can do about it, that’s why the anti cheat is there though it’s a bit sensitive and tends to kick players who lag. : (
Agreed, this is why I have a huge amount of respect for the moderators. They put in countless hours to help keep our playing grounds fair.
If you can, record video evidence of them hacking and upload it somewhere (preferably YouTube or something similar) and then post it here: https://skywars.com/forums/reports.40/
I haven't known the mods for long or at all, but I can tell they are putting in the hard work to keep the server alive and well!