If nothing has happened, then nothing needs to be done. I sometimes float exploits in the rules past my friends for various games, but make it clear I have no intention of playing that way.
I even tested something in Terraforming Mars this past weekend. I made it clear with the group ahead of time that I wanted to try something, what the strategy was, and how I would be playing. They were all fine with it, and it turned out the strategy was broken as hell. Won by 12 points against a fairly experienced group. It’s also a boring way to play that game and I wouldn’t care to do it again.
That’s also how I know that it’s fruitless to expect rules to avoid these situations entirely. They must be handled socially. Any other tool is inadequate.
What are you even on about? If there’s a flaw in the system, the best that can be done is make it clear to the group that we shouldn’t abuse this, and hope the official rules are changed at some point.