Literally would crunch ice from a big metal cup ALL DAY LONG (walk to the soda fountain in the break room and refill with ice every hour).

I encountered two people like this in my life. It would make me physically ill, like an allergy, but no one else around us complained so I tried to get over it and ended up just working in a lab.

I'm old enough now were it to happen again I'd flood every channel with complaints until we arrived at a compromise, but I was younger then.