Our 11th principle!
Respect the autonomy of the individual: every person has the right to make decisions about their own body, property, and personal space. What you see as a gift might be a curse if it is unwelcome (or unwanted), so when giving a gift, entering someone’s personal space, taking a photo or video, or using someone’s property, ask permission first. Only proceed if there is consent between all parties.
Do not ever assume that you have consent based upon what a person is wearing or how they are acting. Consent must be mutual, definite, and given consciously, and persons are free to change their mind at any time. Remember that consent for one act does not imply consent for all acts, and consent given once does not mean that you have consent every time.
No always means no.