The problem is maybe that people _think_ it is safe to send "personal" messages.
No one would send personal information through Facebook public posts, but if Facebook has a "private" or "group" setting then people will trust that thing is really not being seen by anybody.
I don't use Facebook or WhatsApp to not encourage these stupidities, but some other day a friend told me she was very annoyed by the fact that advertisign suddenly began to appear on Facebook about a topic she had just mentioned in a "private" chat conversation.
No one would send personal information through Facebook public posts, but if Facebook has a "private" or "group" setting then people will trust that thing is really not being seen by anybody.
I don't use Facebook or WhatsApp to not encourage these stupidities, but some other day a friend told me she was very annoyed by the fact that advertisign suddenly began to appear on Facebook about a topic she had just mentioned in a "private" chat conversation.