Right - FBI procedure is to let their people collect samples while their long hair dangles all over the place.
LOL, I always have issues with CSI women not pulling their hair back. That being said, I loved the interviews, can't wait for the show to start.
Especially if they're working with HAIR samples, like Katz is doing in Manhunter (while leaning over the tissue note), although the actress playing her had shorter hair than Hetienne Park. The point is in real life they'd (both mean and women) have to wear those things on their heads like you see workers wearing in hospital sometimes, or working in clean-room environments such as microcircuit assembly lines.