My apologies for being slow to respond, but I felt there should also be a response from the moderators here.  MO is covered by Stack Exchange's Conduct Policy (https://meta.stackexchange.com/conduct) and has no other separate conduct policy.  This policy specifically bans harassment, and empowers moderators to impose penalties, up to banning users, in response to such behavior.  The moderators support this policy, and endeavor to enforce to the best of their ability.