I never saw that happen, besides I'm sure it would be easy to code into the map for them not to follow you into specific areas. It really was incredible though. I remember loving to get them up on a balcony, lay down a smoke grenade, then start shooting at the CTs out in the open, using the hostages as human shields. I also remember our team fighting really hard in cs_militia as CT, only to come into the house and find all the hostages gone because the T's moved them all to the bathroom instead and ambushed us at the normal hostage pickup point. You could move the hostages until Beta 9 or 1.0 I believe, it's too bad they took that out.
Oh man I remember those days, way to bring back fond memories. It feels like so long ago..., feeling pretty old. As far as CS:GO, even though there is clearly not much new material and an obvious "built for console usage as well" feel too, I'm trying to stay optimistic. I'm too much of a CS fan to give up hope just yet, though I am starting to worry about Valve failing to deliver what the people ask for...time and time again, but there is hope.