PSA: never discuss private affairs in your DMs, especially contraception and abortion. Social media moguls will absolutely sell you out to the government. There are already cases of people being charged based on evidence in their DMs.
If you are part of a vulnerable group – LGBT+, ethnic minority, women, religious minority, teen, anyone – do not think they won’t hand your DMs to a government looking to persecute you. Yes, including feckin’ Tumblr.
i figured this was common knowledge, but in case you don’t know – NO social media messaging service like this is safe to discuss such things. i’ve heard signal is good and i know it has a great reputation, but never ever ever trust a company to not hand over your data and DMs in a heartbeat