It's a mixed bag. It will make people pay attention to what you write (I'm sure it has influenced Le Monde to pay attention to you - remember their piece Jérôme Guillet Un X d'influence?), and being seen as an insider will both help add weight to your argument and open you to character assassination (both of which one can see in the comments).

Interesting that both in the personal profile and in this case they ignored the reference to European Tribune: in the first case they focused on your stature on Daily Kos, and in the second case they simply dropped it from the signature.

Oye, vatos, dees English sink todos mi ships, chinga sus madres, so escuche: el fleet es ahora refloated, OK? — The War Nerd