You could always respect your parents decision, since they're only limiting you for a small part of the night, when you would probably be better off either sleeping or doing something more productive, like reading, rather than just chatting to strangers across the internet.
It's hardly a big issue, and you are a minor and your parents are the ones providing everything for you. The least you could do is abide by their rather loose rules.
The fact that you're trying to find ways to go behind their backs might just prove that you're not really mature enough in their eyes to have access to the internet all night.