[The Dutch Problem]

It is exploiting if you can see through walls, wich is directly wallhacking. I mean, what else can it bloody be? TTT and the vast majority of its maps require CSS files. If you do not have these you can see through walls or see black and purple/pink squares everywhere with the occasional ERROR. As such it is exploiting, wallhacking and adds a lovely pint of metagaming to the mix as well.