Over the past four years - and often being the one of the only students on our team that understands
every single subsystem on our robot inside-and-out - I've talked to a lot of scouts. And the issue with many of them is not always that they do not know what they are doing, but many times it's that they are shy and introverted. To them, being a "people person" can be quite hard!
So don't bash someone just because they are shy and don't show spirit while scouting. Instead work with them, be friendly, and make them feel better about what they are doing. Be helpful and anticipate their questions. If they are asking about your drivetrain, elaborate on it - but without going too far into petty details, and you may answer some of their additional questions.
When you are helping scouts, you are the voice of your team, so be truthful, succinct, sociable. If the scouts feel more at ease, then everyone wins.
