If Iwan is to use this opportunity, he would need to attack while there's still little order and much sorrow among Fairy Tail.

Anyway, while logic dictates I'd still need to completely disagree with Ryouga's point - simply because nobody should listen to the enemy's ramblings in the middle of a fight - the amount of shounen shows where the good guys do take to heart the words of their worst enemy is so high that I suppose there does exist such a danger for Gajeel. However, even if such a thing did happen, I think it would go down the way Archie predicted. When Erza, the other two Dragon Slayers, Levy, Gray and some others vouch for Gajeel, I believe it will shut up the rest. I'm not sure even Laxus would protest, after everything he has gone through.