Brooklyn Technical High School math and science teacher Sean Shaynak has been accused of having sex with underage students, asking underage students to engage in lesbian sex with each other, taking an underage student to a nude beach and a sex club, texting students nude photographs, and sending one student over 10,000 texts, among other things. Oh, one more thing: he had a knack for wearing incredibly inappropriate Halloween costumes, including the Britney Spears-inspired number you can see above.

Shaynak, who has been charged with 36 counts of kidnapping, forcible touching and sex abuse against six teen girls between 2011 and 2014, dressed as Britney Spears in her "...Baby One More Time" Catholic-schoolgirl outfit in 2012 at the school's senior Masquerade Ball. He also dressed as a French maid in a short dress while chaperoning the 2009 ball. He was voted "most unique," and also allegedly "flashed his rear end" during that event.

"Someone should have told him he was crossing the line," a colleague told the Post. Another colleague said that Shaynak was protected because of his friendship with Principal Randy Asher: "That gave him free rein. They turned a blind eye to his indiscretions."

Asher, who spoke to outraged parents and teachers a few weeks ago, claims school officials only found out about the allegations after it came out in the press, which was sparked when Shaynak allegedly sent a teen a photo of his genitals and she told her parents. "As an educator, I'm horrified, I'm frustrated, and as a professional frankly disgusted," he said at the time.