system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why couldn't Harry just not enter the tri wizard tournament?

Everyone clearly hated it including Harry so why not just not let him join?
gpt
Apparently your name being in the Goblet invokes a "magically binding contract". It's never explained what exactly that means, though. Presumably refusing to enter would have consequences no one is willing to consider.