Going to quote myself from another thread and edit it a bit.
"Imagine if we had 100 staff member and maybe 5000 players, the amount of players who would call hacks on an innocent party is high, like crazy high.
(salty players) and those who aren't too sure about hacks, just report them anyways cause why not.
Lets not forget about the amount of players who use /report just to talk to staff members and get their attention. << ignore this as the thread I took it from was about adding /report
So we can't just send every staff member everywhere to monitor, it isn't as efficient as it seem.
Getting them on the reporting site is easier and also shortens the "hackcusation" because if you're going to call hacks on someone for the sake of being a salty kid, you're not going to put in effort to actually report someone you know isn't hacking but still killed you.
Hope you understand where I'm coming from, I know it's frustrating but there isn't much we can do, just hope that someone else catches him"