I assume all tech companies are doing this even ones that claim to protect the privacy of their customers. There is no privacy on the web. Don’t put anything online that you don’t want others to know or see.
What other relationships is Facebook hiding? Better alternatives exist.
I use Signal. I have also been meaning to try Molly, a hardened version of Signal, but I haven't had the time.
https://www.dailymail.co.uk/news/article-13262517/facebook-netflix-user-dms-tailor-content.html
Discussion
agree. this is why encryption is extremely important.