Bourgeois behavior photographed and given to Tash in a situation where she can't "make it proletarian" by sharing some?
That or Iowa installed some of that nifty lightbulb cum cameras in strategic locations. The method is unclear this far, but Ido said it himself in that Pixiv Sketch: Iowa won't take it sitting down. :P
HereSLAM!Comrade Gangut!How long are you going to be holed up in the toilet for!?Pipe-equipped miniature cameraComrade!Oh, this?IOWAAAANDon't develop in the toilet!Okay! It came out perfect!What even is that?Blackmail material.Geez!g'chkkOh, sorry for the wait.