[the_godfaubel]

If you are on a school sponsored team, approach the principal and administrators about the events. That should hopefully resolve the conflict.

If you are not on a school sponsored team, my only advice is that you should gather everyone that supports your stance and approach the lead mentor as a group. They are the one that is responsible for the entire team's actions. If this does not work, the only thing that could stop this from reoccurring would be to contact FIRST. It is supposed to be fun and lead people to wanting to get involved in STEM fields, not push them away because some people have to ruin it.

Honestly, the adults on your team are the most shameful because they are supposed to be the ones that guide you in situations relating, not only to robotics related events, but also tough life situations. I can only hope that not every adult is so immature to let people get away with bullying. I wish you the best of luck to getting your unfortunate predicament resolved.