No, not at all. LOL.
If it did, it would be like WoW's exp penalty system which, imo, is the most retarded thing in MMO history. Of course they had to change it again once they realized how stupid of an idea it was. Now you can't be penalized more than "normal" which is 100% exp per kill. Before, they had you going into the negative penalty the more you stayed online and earned experience, and the limit was the 8 hour mark. -_-
That game is just awful once it came out of Friends & Family beta. Back then, it was a great game.