Roblox hacks are everywhere, in all sorts of places

Do you guys know a game called "Zombie Attack"? It's a game where multiple users gather to defeat hordes of zombies and survive as many waves as possible. You lose if all users die or if you can't defeat the target number of zombies within the time limit. But there are hackers in this game too, seriously... I saw something like a fly hack where someone was spinning around above the zombies and shooting. I don't understand what's fun about playing games with hacks.