I believe there are already bots who actually are trying to uphold the illusion of conversation. Either that, or these players are extremely nerdy. I have done missions where one player constantly spams information about himself, like:
I am lvl 16 and I am 65% bla bla bla.
I am wielding a blah bla and a blah.
My health is blah of blah.
And when they die, they keep on asking to resurect them, even when there are about 10 agressors standing on top of his body. Or, in the middle of a tough fight they suddenly ask "So, where is everybody from?"
Suffice to say, that I am not called "Silent Kitty" for my fondness of idle chit chat when on a mission