3. Could a person be held liable for voyeurism for taking a photo of an individual’s buttocks in a public place?
Yes. As an individual's buttocks is an intimate part, if a person were to take a photo or photographs of an individual's buttocks in a public place without their consent, it will be voyeurism since visual recordings include clandestine photography or digital images aside from the above-mentioned hidden camera recordings.
If an individual gives consent to allow for their buttocks to be photographed in a public place, although this will not amount to voyeurism since it would constitute as a consensual act, the parties involved may be in violation of other laws such as indecent exposure under section 148 of the Crimes Ordinance.