no theft isnt infringement, the infringement happens when you distribute your product. the viewing experience is what is paid for by ticket, camming subverts the sale of the experience. if someone went into a strip club with a camera and recorded the live show thats theft as well. When the dancer produces thier own disk and distributes it thats in the same boat as a DVD release and any number of eyes can experience that video when the producer gets [guess ~ 50$- 100$] for a disk sale.