You don't have to follow the rules. If openSUSE says you have to be over 16 to use their website, but you're not over 16, you can still use their website. They aren't actually stopping you.

Author here.

Your argumentation holds as long as there are no technical measures. Look outside the window, and you will find that this is rather a matter of weeks than decades.

Also, in pedagogic settings, we don't walk around telling young people to lie. Individuals may choose to, but we'd rather work on agreed-upon rules we can all accept without lying.

Actually, yes they are stopping you. They have withheld consent.