Some of the people who commented clearly said not to ban them, meaning they know they can be banned for it. But it makes me wonder, why do they comment then, if they really love the site so much they don't want to leave it? What makes the urge to comment so strong that people simply cannot resist revealing themselves even if they are 100% aware that their comment gives anyone who passes by a valid reason to ban them?
If people comment their age when they know the rules, and they get banned, they have no one but themselves to get angry at. There is no obligation to comment whatsoever, so really, the only reason why someone like that would reveal their age is because they really just are too naive to realize there might be consequences to what they say.