> She said if my daughter showed up by bike she wouldn’t be allowed into the building. If they saw the bike locked up to the fence they’d cut the lock and impound it.

I would try to record this conversation, and once I had the recording, warn the principal in a public letter that would be a criminal act and cause for a civil suit, and threaten to also take it to the local news media. Of course, if my daughter was willing to take up this fight.