“Open Mic” night May 2 at the SUNY Oswego Lifestyles Center turned out to not be so open after all.

Taking the title at face value, conservative student Nicole Miller gave a speech about liberal intolerance on campus and — wait for it — got put on warning for making other students “uncomfortable.”

The school’s Alcohol and Other Drugs Program coordinator, Trisha DeWolf, emailed Miller to say that if she did it again, she’d be banned from future open-mic events. (Kudos to the website Campus Reform for publicizing the remarkable missive.)

While insisting she was “in support of [Miller’s] freedom of speech,” DeWolf said she’d been “implored” to reach out by students who felt “deeply hurt” by the speech.

DeWolf added, “any complaint after [the warning] may result in being asked to not perform at open mic.” Oh, she’ll issue written guidelines for what performers can say.

Ironically, Miller had complained that lefties on campus are intolerant, citing “horror stories . . . about the brutal mental and emotional attacks on” conservatives. “It sickens me to death that the people that preach tolerance and acceptance of all people are so openly against us and our beliefs,” she said.

Bad enough that other students proceeded to prove her point; far worse that an administrator would back them up.

Now consider the University of Denver, where two righty student groups are on the verge of shutting down, as The College Fix reports. After constant investigations by school officials and harassment by fellow students, the Young Americans for Freedom and Federalist Society chapters have seen plummeting membership.

The “offense”: hosting guests who challenge progressive pieties on gender and racial issues, which the left now treats as hate speech.

Radicals are aiming to literally ban dissent on campus, and administrators regularly back them up. At this rate, any college that doesn’t adopt forceful free-speech protections is going to wind up as a re-education camp.