From the modding policy:
Feel free to report someone you think is breaking the modding policy – relevant to the mod in question, probably the first point “Using mods that directly affect unmodded players’ experience of the game and/or is used to grief other players. Examples: Speed hacks, outright cheating in missions, etc.” – but FS doesn’t discuss taking action against accounts, so you won’t know the outcome of your report.
And Helldivers 2 is lousy with cheats, which are just a Google search away. Since there is no server-side authentication/authority (everything is P2P), it’s actually much easier to hack and cheat and affect other players in significant ways. The infinite health hypothetical mentioned above is actually possible in HD2.