That would bug me too - it falls under personal hygiene and should be done at home or in a bathroom. There was a girl doing it in class yesterday, and she was clueless that EVERYONE could hear her - even people from the total opposite side of the room were turning around to look at her and she didn't get the hint
dormlife makes you become more public about your hygeine....public bathrooms and sharing an 11' by 10.5' cell with someone will definately make you less modest.
However, I don't think I'd ever cut my nails in public.
When I was flying to Texas last Friday, this old guy was picking his nose in the seat next to me. I mean, he was really digging for treasure there. He kept doing it! He must have gotten half his finger up there.