Final answer:
Using photos without permission violates copyright laws, and one must obtain written permission from the copyright holder unless the image is freely shareable in the public domain.
Step-by-step explanation:
If you use photos you do not legally have permission to use, you would be violating copyright laws. According to intellectual property law, unless an image is in the public domain or explicitly states that you are free to share it, it is protected and requires written permission from the copyright holder. This is similar to how quoting text requires citation, but with the added step of securing permission for images. Violating copyright law can lead to legal consequences as determined by state and federal governments, and highlighted in cases such as MGM Studios v. Grokster (2005).