but you got private messages to discuss about private stuff and visitor messages just for some non private quick words
Ultimately, leaving someone a PM is no more effort than leaving a visitor message. You're still typing in a little box and hitting submit. I exchange "quick words" with people via PM all the time. Just because you (for some reason) feel confined to Visitor Messages for such things doesn't mean everyone else does.
I can understand why one wouldn't want all their VM conversations displayed to the public... Or wanting to use them solely as a method for contacting friends. Afterall.... If someone else wants to contact you, they can always use PMs.
“Everybody has a secret world inside of them. All of the people of the world, I mean everybody. No matter how dull and boring they are on the outside, inside
them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe.” -Neil Gaiman