The security vuln is that it's owned by a bad faith actor

https://news.ycombinator.com/item?id=1692122

https://news.ycombinator.com/item?id=25662215

I get this is snarky and it being HN I'll now collect my downvotes, but really, I can't not hear Whatsapp without also thinking Facebook; the entire product may as well be a security vuln