Is using Midjourney against the law?

Using Midjourney, which is presumably a software or service, is not inherently against the law. Like any tool or technology, its legality depends on how it is used. If it is utilized within the bounds of copyright law, privacy regulations, and other relevant legislation, then using Midjourney would be legal. However, if an individual or entity uses it to commit unlawful acts such as copyright infringement, unauthorized computer access, fraud, or other illegal activities, that usage would indeed be against the law. Generally, the responsibility falls on the user to ensure that their use of any software or service complies with all applicable laws and regulations.