Thank you all guys for your time and effort. I have already received the information I wanted. These two nicks are pissing me off in the exact same way and I just wanted to know whether their same IP addresses would support my theory or not. I would not condemn them publicly, since, as you say, there's no 100% proof they're actually the same person, however, I made my own mind and that's what I had been aiming for.
(Cacher) Lorsque vous jouez un coup dans une partie, vous pouvez décider quelle autre sera affichée en suivant en choisissant l'option appropriée dans la liste des 'aller à'. (pauloaguia) (Montrer toutes les astuces)