To install a map hack in DotA 1 was to betray the spirit of the game. It turned a beautiful chess match of deduction and intuition into a dull, omniscient spreadsheet. You could see the enemy Pudge hiding in the trees, but you also lost the adrenaline spike of walking past him blindly.
Why did so many people risk downloading viruses (many maphack files were keyloggers or trojans) to cheat? hack map dota 1
Displaying a "ping" or red circle when an enemy clicked a unit or cast a spell in the fog. Rune Monitoring: To install a map hack in DotA 1
IceFrog and the various platform developers (Garena, RGC, EuroBattle) fought a constant battle against these tools. hack map dota 1