I fooled them. But, you had to be certifiably NUTZOID to seal it up and open the vents.
Stories abound....first hand.
Fresh out of shipyard overhaul....sea trials....come back and somebody finds a hole in the hull (water in the people part) where the shipyard cut out a through hull fitting....and covered said hole with EB Green.
EB green is a sort of superman green duct tape used by Electric Boat (hence the "EB").
Or the boomer sealing up, and somebody sees daylight off beside the inner access hatch....and gets the dive stopped before serious consequences ensue.
You've never lived until the boat gets shoved down by a rogue wave while on the surface, with folks on the bridge....to 125' depth...and bridge hatches open..and 110VAC in the water running out of the light fixtures.....if I wasn't nutzoid before that, I was afterwards.