I added a mutator system (applied before a multiplayer match), and some of the mutators literally give cheat mode to all players in the lobby. Wallhacks, aimbot, infinite ammo, speed hacks, you name it. It's fair play if everyone gets them though, right? Still feels wrong.
This continues the mashup philoshophy of my game development. It's a boomer shooter, but has heavy influence from Call of Duty in terms of game / match structure, and several ideas from Unreal Tournament as well (instagib, and now mutators).