Erzie is an effing hero!

[Epo]

I will concede I wasn't there when Erzie did it, but I will agree that JDs and Cloaks shouldn't be used in conjunction, at least, for the purpose of offensive/defensive actions. It's like giving Solid Snake a Capship with Cloaks and JDs, he's going to use it for a Sneak attack.

Actually cloak + jd 2 or 3 should be fine. It may be a very fun defensive weapon.
About cloak + JD4, i've got mixed feelings tbh. It may be used as fancy offensive weapon, but it may also cause stuff like above.