People who harass others prevent those people, and people like them, from feeling welcome and safe. Harassment is absolutely prohibited during our programs. Additionally, students with a history of harassing others are not welcome even if the harassment takes place outside our events.
We cannot possibly list every situation which may be harassment. If you're not sure whether you can do something, don't do it; and if you aren't sure whether you can report something, report it. We want our community to be friendly and welcoming, and anything which is even borderline harassment doesn't fit.
All that said, here are some clear examples of harassment: