That, and please stop talking about reddit so much, dear god. My feed is filled with reddit news, rather than the respective topics of each community I'm subscribed to.
I can't see this actually being a big deal, like at all, lmao. This assumes everyone cares or even knows the implications of a contact poster, and you can even make them for contacts that haven't made one themselves. If you automatically think "ew Android!" when someone didn't make a contact poster (when they can literally be on iOS, but not make one), you have issues.