Relevant excerpt
Oberlin College is committed to maintaining an environment where open, vigorous debate and speech can occur. This commitment entails encouraging and assisting organizations that want to sponsor speakers, films, and other forms of expression as well as informing students who seek guidance concerning forms of protest against speakers. It may also involve paying for extraordinary security measures in connection with a controversial speaker.
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Displaying a sign (signs may not be mounted on poles when displayed indoors), wearing expressive clothing, gesturing, standing, or otherwise protesting noiselessly is acceptable and must not be interfered with, unless the protest interferes with the audience’s view or prevents the audience from paying attention to the speaker.