IAWTP. I'd imagine that a resident of Gotham--especially one who works night shifts--would get used to Batman swinging and leaping around; of course it helps he isn't super-powered. A resident of Metropolis may well get used to seeing Superman flying around, lifting enormous objects and such, because even with all his powers and extraterrestrial origin he looks enough like a human being. But I suppose it'd be much harder for a New Yorker (is that still where Plas is based?) ever to get used to a seeing a guy who can assume pretty much any shape, size or consistency he wants. In Watchmen, we see that Dr. Manhattan's appearance and powers, even after he's been around for decades, totally freak out many people ("I feel sick...They're not paying me enough to handle monsters from outta space!") And this is a guy who retains something like a human shape even as he does his quantum thing. So all the more so with Plastic Man.