No need to derail a thread for a question easily answered by one's own abilities.
It's not a matter of everyone telling one person to go look up a term. It's that there isn't just a single person who wouldn't know what VAC means, so when writing posts you should try to elaborate on terms that people might not understand (if it's the author's intention to let anyone read it). If ten people came in here asking wondering what VAC was, would you ask them all to go look it up? Or would it be better to have one person answer the question here?
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This sounds absolutely absurd, lifetime bans shouldn't be applied to underage-user's accounts. At the same time, if it was in the tournament rules then I suppose it's the player's fault, even if it's a stupid rule.