[Jon Stratis]

Originally Posted by magnets

Any adult working with a FIRST team who is aware
of a violation of this Code, or who is in doubt about
whether or not a behavior is appropriate, is required
to immediately consult a team Lead Coach/Mentor (if a
team Lead Coach/Mentor is not the potential violator), or
the hosting school or organization, and if satisfied with
the guidance provided, to act in accordance with it.

and

Engaging in personal exchanges such as phone calls,
e-mail, texting, social networking, etc., with a child
outside the context of team activities, educational
matters, or career concerns.

The content of the messages had nothing to do with education, FIRST, our team, or a career. It was written as a response to a view a student had on something unrelated to robots.

As you said, the mentor used the PM to show the student how they should behave. I, personally, would classify that both career concerns (you need to know how to behave appropriately) and as a team concern, as the student is a representative of the team.