PlayerUnknown's Battlegrounds has been enacting all kinds of different measures in attempts to ensure that cheaters have no place within the community. Many changes have already been made, but some even bigger ones are happening now. Unauthorized programs will now be blocked, as well as Steam's family sharing program.
The latter was allowed before, because PUBG Corp understood that there was a demand for players to be able to use their character across different accounts. Apparently, some exploits have been discovered and utilized thanks to the family sharing program. Thus, it goes bye bye so cheaters can't use it. PUBG Corp says that they want to do what they can for those that are playing PlayerUnknown's Battlegrounds fairly, but these actions need to be made to make the game more enjoyable for all.
The other process that has been banned in the same fell swoop is the use of unauthorized programs. Now what this means is any program that players might use to alter PlayerUnknown's Battlegrounds in any way. For some, this might just mean changing up the graphics in some way. But in order to block the ones that might help with auto-aim, or potentially the ability to see through walls, PUBG Corp had to do away with all exterior programs.
This is another one-size-fits-most approach to getting rid of cheating problems withing PlayerUnknown's Battlegrounds, but at least it's an attempt. PUBG Corp says that they welcome player feedback of every kind, and hope they can continue alterations that will benefit everyone.
Source: PC Gamer