That's an incredibly bad idea. One argument - what do you imagine will happen when the server fills up and a lot of people start spamming in trade chat for whatever they need/want? It'll be too fast to follow and it'll be annoying.
Hi, it would be nice that you could share/see other people journeys to see what paths they took in their adventure.
"This dude killed this monster when he was just lvl 10."
"I can see this man has explored the whole world maybe he could show me where to go next or where to find this kind of plant i need."
"Hey look! That orc over there has been nailing it in pvp since lvl 10."
It may be a silly thing but who knows...