Is it possible to "vanish" players on a online game?

[Theiago]

Im currently playing on a very big server, and, sometimes, random players mess around with things like opening chests.
I Was wondering if its possible to make a mod to "vanish" those players, and then be able to open the chests.
I Searched a lot and didnt found anything, so, any help is appreciated.

 

Edit: Im playing in minecraft 1.5.2.

Edited May 9, 2018 by Theiago

[Blaez]

1.5.2 .... 1.5.2... sorry this place doesn't support even 1.7.10 anymore. good luck getting any kind of support here.

[MDW01]

Even if we did support 1.5.2 the server would still need to be a forge server and you would have to install the mod there too. Also Seriously update 1.5.2 is over 5 years old.