luffy has listened to everything iva has told him. i think jimbei and iva will make it pretty damn clear that going in crazy won't do anything but make them fail miserably. luffy isn't stupid either he knows that the 3 admirals will be there and other very powerful guys. he got his ass kicked at the shabondy islands and he knows he can't take them on.
He was also doing a fairly good job not getting the attention of the Impel Down guards till Buggy ruined everything. I think it comes down to if Jimbei or someone asks Luffy to promise them something he 'won't' do… that means he probably will before the end whether it was his intention to or not XD Thats how it always works out to be... just like how Zoro always gets lost... always, especially if he is told explicitly not to >_>