Is installing iOS 7 beta without a developer account legal? (updated)

What it says in the title, basically. Am I breaking the law if I get iOS 7 beta without an Apple developer account? Also, is the latest beta stable enough for everyday use - no bricking the phone etc.?

Responses needed ASAP - trying to persuade my dear parents to let me try the iOS 7 beta on my iPhone 5. Thanks!

UPDATE: thanks a lot for all the responses. I didn't install it after all because of the potential issues with using it without a developer account, and I'm going to wait until the final version.