Yesterday, in an attempt to either thwart or unmask our mysterious flasher, I visited a number of small boutiques and clothing stores, telling them about the problems we've had, and asking if they've had any similar problems. People were glad to know about the situation, and very thankful that I was going around doing this.
At one of the stores, I got to talking with the guy about weird people in general, and he started telling me a whole series of stories from when he worked in a local bookstore. There was one guy who would shit in the sci-fi section, and a few other similar things. The icing on the cake (haha) however was the following: There was one guy who would come in and masturbate in his pants. When a woman leaned over to get a book off of one of the bottom shelves, he'd whip it out and shoot in her hair. The guy I was talking to said they'd know when it happened, because they'd hear a woman scream, and then see a guy sprint out of the store.
They never caught him. Be careful in bookstores, ladies.
