You really like to exaggerate.
If a player comes on a sever and sees a hacker, you can't jump to a conclusion and say that they will most likely leave. You said there are quite a lot of hackers on the server, so I'm sure a new player has run into a hacker their first time on the server. If all of these new players that saw a hacker on their first time on the server, CubeCraft would be dead. But it isn't.
The staff aren't going to teleport to the player and watch them. Why? Because majority of the time a staff member is on, they are busy doing things. A staff member isn't gonna come on the server to sit around and wait for a player report to come in. It's just not going to happen. And the way you keep explaining it in various threads, you make it seem like that's all the staff do, is work with player reports. They do other things too, so you can't expect staff to teleport to a player. Also, I don't even know if it is possible for a staff member to teleport into a game server such as skywars or eggwars and go into /v to watch the player anyways.