It's called ESP hack, whereas you can see players and all sorts of items nearby, but it's impossible for you to have one, as it requires a good skill of reverse engineering and C++, talking about the bypass of course.
Is it possible and people playing hacks, play with me on the server?
Hooks start by changing source code like Soldat graphics?
Yep it is possible, There are also hacks like the CRATE DROP Instant loot, where in you can loot already the crate just as the plane drops it. By the time people who were after the crates arrived there, there is no loot any more.
Btw, these ESP loot item hacks they come in colors from High priority to low priority loots.