It's good that file check is enabled on your server, but quite a lot of players play with corrupted files in their Bin32/Bin64 folder. I think it's some broken Crysis copy from torrents. Also, few players play with GerCry multiplayer "client" so they use edited CryNetwork.dll and LAW Mod cheat that modifies the following files:
[code]
Game/Scripts/Entities/Items/XML/Offhand.xml
Game/Scripts/Entities/Items/XML/Weapons/Multiplayer/LAW.xml
[/code]
There are even 1 or 2 players that still use the old version of sfwcl that modifies the following files:
[code]
Game/Scripts/Main.lua
Game/Scripts/GameRules/InstantAction.lua
[/code]
All these things are not so harmful (maybe except that LAW Mod), so servers probably shouldn't kick players for having them, but who knows...
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