They are implying player teleporting, which is a common hack in BRs.
Player movement data that is too fast for normal players could be seen as cheating. An AI isn't strictly needed for that, just check displacement over time.
Is it really a common hack? I would have guessed teleportation is the easiest to detect server-side, or impossible from the start as the server is authoritative (clients sends inputs, the server computes the positions and any important change, sends them back to clients, clients cannot hack their movement).
Player movement data that is too fast for normal players could be seen as cheating. An AI isn't strictly needed for that, just check displacement over time.