Do I have some social obligation to hide the fact that I was homeless at one time?

>According to the maxim of relation (or relevance), a cooperative speaker should not convey any information that is not relevant in the context of the utterance

https://www.oxfordbibliographies.com/display/document/obo-97...

That might be relevant, if having been homeless was irrelevant to the point being made.

It never occurred to me that there was a rule about public displays of residence like for public displays of affection, but I guess there is.

(inappropriate and maybe even criminal in the presense of children, unless you're straight & monogamous, in that case it's fine)

It's something that effects a different perspective of the things being discussed. It's no different from someone commenting from their perspective as someone with adhd, or from a country that isn't the USA, etc