https://www.sciencedaily.com/releases/2019/08/190815120648.htm

"Hey Siri, is the way we talk to you making humans less polite?"

OK, OK, they didn't ask Siri. Or Alexa. Instead they asked 274 people, and after surveying and observing those people, they found some good news: Artificially-intelligent digital assistants are not making adult humans ruder to other humans. Yet.