Imagine the police finds out that a criminal organization has been distributing drugs. But this organization doesn't use the drugs, they just distribute it. Will the police arrest only the drug users? Or will they arrest the criminal organization aswell? They will arrest both because the damages that the drugs caused is the responsibility of this organization.
If you still didn't understand that analogy, I'll make it even simpler for you, in that story the criminal organization would be ON and the drug users would be the players that got these hacks, the police would be the servers owners.
I respect you as a developer but I would like to clarify the following.
Right, but there's no rule about distribution in vcmp. It's a fact. Operate to "common sense" as you mentioned earlier is your or community initiative. You should know there are different laws in specific community or society. Regarding your analogy some kind and amount of drugs are legal / partly legal in one country and illegal in another one. For example USA state laws vary considerably. Or just check wiki about legalization of cannabis
https://en.wikipedia.org/wiki/Legality_of_cannabis#/media/File:World-cannabis-laws.png"Common sense" approach is totally illogical in this case because it is subjective.
By the same criteria we can punish potential "chlenix1337" users because they want to use hack in game.
IMHO:
1) The right decision here is punishing people who have used hacks in game.
2) Add the rule in server rules about distribution of hacks.
3) Make a list of permitted and prohibited modifications:
Very many players use custom sniper's cross-hair, it's a game modification that provides you advantages over other players without it.
Some players like Noori prefer a game without grass. Is it fair? I don't think so, but the most of community don't care about that.
4) Update and adapt rules like laws and strictly adhere to it.
Then similar contradictions can be prevented.