This is why a module I'm working on has a separate display mode when in edit mode.  When a person is logged in with edit capabilities it just shows a link to display the information.  Then if it has unwanted behavior I can still get to the module settings and if he wants to see the output he can click the link.  Gee, I hope that makes sense.. 

While I have little experience with the iframe module, I would think you could change the sql database (if you are so inclined) to temporarily disable the iframe action.  Maybe change its src value to some other page and then put it back later.  It is found in the modulesettings table.  You have to get the moduleID first.

mj