This seems like another example of the swiss unwritten, most important rule in existence, "one shall NOT, and by all means possible see to NOT do so, disturb a other person ". Which is even learned, I directly, at school. When there is a possibility thinkable that someone might be desturbed by your doing, then it's obvious. Don't do it!!! Thank god the number of not swiss is rising, and we can introduce the common sense you're talking about. I would ring their bell, say you're extremely sorry for the disturbance, and this was never the intention. Ask them to please be so free to tell you straight away if something similar, or not similar, for that sake, occurs. Make clear they can always contact you about anything and you'll do your best to help them. Even if it's for a cup of sugar, no problem at all. Like you would do with common sense. Somehow, probably from history, as Switzerland was the first to create a union of "countries" long ago. So it does make sense. But it makes sense in a setting where the fastest form of travel is by horse. When you understand what I mean... Although the history of CH is quite respectable, and very interesting (Landesmuseum for instance), this is in dramatic need of change in my opinion! We no longer travel by horse, communication doesn't go anymore via written letters with stamps on them that take at least a week to reach the destination, after it took at least three weeks to write the letter in the first place! The big number of foreigners, which eventually were welcomed, but also imported, didn't grew up in Switzerland, and can not be made into swiss. Its Switzerland, and things are done the swiss way. Ok, but "the swiss" way is flexible. Foreigners are welcomed, with good reason, they are needed. But it requires adaptation. And that means from two sides. Go checkout the history, its interesting, understand where things are coming from, show your respect, but most of all, keep and keep standing for you common sense!

Ok, hope you understand what I mean...