
Notice how the only things running up to help Selina were cats, not humans. He likely wouldn't have gotten caught, and even if he had he'd be able to charm and/or bribe his way out of the whole mess. Is Shreck that cocky about his ability to not get caught? Is pushing Selina Kyle into the street the best idea? Other people could see her falling out the window.The mirrors themselves also point inwards, towards the house (for perhaps obvious reasons), so you can't really see what they are without being up close (which, again, most people wouldn't be) if you happened to notice them you'd likely just assume they were part of the roof ornamentation. It's not like there's many people poking around there to begin with. They are secretly installed and disguised on the roof of his giant stately home miles away from anywhere.It'd be a bit odd for the son of murder victims not to at least notice reports that there's some weirdo in a costume beating up criminals in his hometown. Or maybe he just lets people think he's a bit of a Batman spotter, innocently keeping track of the mysterious vigilante's appearances from the sidelines.Plus, he can likely retract them back into the Batcave. Well it's late at night and it's winter, so the constant snowing would hide them.Wouldn't the giant magnifying glasses mounted to the roof of Wayne Manor that catches the light of the Bat-Signal tip people off about Bruce Wayne being Batman?.But since children began disappearing anywhere the circus went (because he was a part of it), the entire troupe was suspected of kidnap. It may not have been the entire Red Triangle Gang, just the Penguin himself.While the circus members are never explicitly stated to be in any way like that particular stereotype of traveling performers as child snatchers, it does seem like this was intended as part of their backstory. The usually stated purpose was that they adopted them and raised them to add to their own numbers. My theory is that the screenwriter(s) were conflating some stereotypes about carnies/circus folk/traveling gypsies/other insular nomadic subcultures wherein it was said (however grotesquely inaccurately) that they would steal children. Given how the circus members seem to have reacted (I assume the fat clown was simply the only one brave enough to speak up), they were unaware up 'till then of exactly what the Penguin intended to do with those lists of children. I doubt it was a dry run for the Penguin's ultimate plan.He restarts this plan when his mayoral run gets derailed.

It's Penguin's plot all along, after all - his plan in Gotham is merely to use Shreck to gain access to places like the Gotham Hall of Records, take notes on that year's newborn children, and dump them in the sewer when the time came. They're being led by the Penguin, who is a childlike monster who is essentially working through his anger at his parents by punishing dozens of other children and treating them to the same thing.Why was the Red Triangle Gang kidnapping children in the events before the movie?.The Penguin says he keeps the toxins separate from everything - “there’s a whole lagoon of this crud in the back.” The water the penguins were swimming in is clean, while the water he plans to drown the kids and Shreck in is polluted by Shreck's own toxins.Considering that this is a comic book movie, maybe the effect was increased intelligence? It would explain why they mourned him in the end.If the sewer water is toxic, then how can those penguins swim in it?.
