Copyrights are very important to follow and acknowledge.
Knowing the picture policy is important. While pictures may be taken or not, those photos may or not be legally allowed to be posted.
Permission from the individual is important, since many rely on photos as income, such as film stars. Permission may need to be either verbal or written depending on policies.
Many conventions have picture policies and rules to be acknowledged. This keeps the convention fun and enjoyable.
Understand that many costumes may have a no touch due to the fragile of the costume or individual rights to personal space.
Dwarven Tavern (www.dwarventavern.net) article author, Dr. Lisa Goins is the co-author of "Dwarven Tavern Short Hooks and Quick Start Story Ideas" and “CEO Business Objectives: Health, Wealth, and Success”. Dwarven Tavern is on Facebook, Google+, Twitter-DwarvenTavern93,, and Dwarven Tavern YouTube Channel.