imo, just as a 3rd party, its not enough to say hacking for the events mentioned above. I see a good amount of corner checking when going through doors and such. A common practice. Except for a few times nobody was there. Could be checking for campers roasting weenies... and there are many here... or simply keeping in mind that corners are common spots for defrosters to be if you know a frozen enemy is near.
There were a few times where I said to myself 'hmmm' why do that? Also, its so noisy with all the explosions I cant imagine that footsteps would have been a factor. However maybe eavesdrop? If I had that in my loadout I wouldnt tell my enemies.