Most people seek to navigate the rules that exist in society in a way that keep them from the risk of unexpected fines etc, and unwanted hassle trying to sort things out retrospectively. Not everyone wants to pick a fight at every opportunity, even when they regard the rule in question as unfair.
Whilst this board primarily is for providing advice to the OPs, we are mindful that many others read it, and so it's not at all unreasonable to provide advice that prevents other people getting into that situation in the first place, especially as your first post started with a hypothetical example, and asked "What to do?" So you were asking for ways to mitigate the problem...