In case you don't know, all colored laser printers imbed tiny yellow dots on the page you cannot see with the naked eye. These dots hold information about your printer, including the serial number, and possibly information about the computer that sent the print job (username, computer name). This info can be linked back to you by law enforcement, even tying the serial number to when, where, and by whom it was purchased.

It's unlikely to make any trouble for you with this flier, but it's always good to keep in mind. You can avoid this with black only print jobs, and you can verify the dots being present with a blue LED in a dark room.