I recall playing with them 5 times, but still I had no idea they were hacking. They seemed to play at a mediocre level where the hack they were using was not obvious to me. It still seems incredibly unfair because I was newer to the game when hackers were so prevalent at the time. It's partly pubg's fault for not detecting hackers earlier, and as a result other players get banned by association which is unfair if they are new like me who would not know any better.