I really don't understand this - FB has repeatedly shown they don't give a shit about users' privacy etc. They also don't care about breaking stuff. This is n

I really don't understand this - FB has repeatedly shown they don't give a shit about users' privacy etc. They also don't care about breaking stuff. This is not the first time it is happening, and won't be the last. So, Why are people putting their work email ids on their FB account???