Me and a few colleagues last night were exchanging war stories of unbelievable and/of CF students.
Sadly these cases seem to be increasing with the marketisation of HE and there's lots of underlying misogyny but there's humour to be found in there somewhere...
One of my colleagues told us about her first lecture at a new university when she mentioned to the students that she'd just started. At the end of the lecture, a student handed her an evaluation of her performance 
Mine would be when a student showed up at my office at 9:45am nearly in tears begging me to let her use my office computer to print her essay (due in at 10am) as her printer had just broken and the computer room was full. I took pity on her. She sat down, plugged in her USB, opened Chrome and went to Facebook . When I challenged her she said he had "plenty of time" as the essay submission was only down the corridor. I threw her out without her printed essay. She filed a formal complaint about me 
Every year I get comments in my module evaluations about my hair. I do have funky hair and I do change it often but still...