To prevent people from doing this, just remove:
- houses
- fences
- hills
- rivers
- bridges
- gates
- rocks
- walls
- tents
- trees
- smokebombs (which spawn buildings.)
and actually all other objects and landscape formations.
Make DTV maps just a flat plain without anything on it and noone will exploit it. To make it actually beatable, nerf bot count and/or stats. You can add variety to it by changing ground textures: sand, grass, snow, mud, dust, rock, steppe... If mapmakers want to give examples of their artistic skills, they can design cloud formations.
Ta-dah: A non-exploitable version of DTV.
Would look odd and be boring. It is a dystopia either way, what a dilemma...