Facebook will censor/shadow-ban such a "good bye" post. It won't show up at most of your friends news feed. You also cannot advertise a competiting social netwo

Facebook will censor/shadow-ban such a "good bye" post. It won't show up at most of your friends news feed. You also cannot advertise a competiting social network. The same goes fr private messages to more than a few people. Even if you try to write a seperate message to everyone, if it contains the same link or a similar text body, most of your friends will never see te message you wrote. That's all automatic. And for photos, they have a semi-automatic review process in place, with an army of contracted FTEs working in low paid countries to scan photos (there was a news story about that recently). I wouldn't be surprised if their other properties like WhatsApp and Instagram are monitored and censored/shadow-ban in a similar fashion nowadays.