All of these demo's you are providing are really short... Him shooting at the box at that bottom does not mean he is WH, I personally always shoot there too...
I recommend getting longer demo's...
All of them show either dodgy aiming or obvious aiming through walls, I know they are a little short but I had to deal with 4 cheaters which I had no access to ban, but still, for me it is kinda obvious that they were cheating, the only one that I can agree it's not reliable is this one, where I lagged.