Yes, I do. And it's fucking uncomfortable. I often wonder if its those whose families have abandoned them (happens frequently) and the care they got while there (it's an excellent facility) is the best thing they remember.
Never could prove it but used to think it was one of those things where once a person notices them it goes through the resident ghosts that a person is there who can see, hear, etc them. then all of them come out of the woodwork trying to get their messages across or want to be acknowledge they are still there. When we were in the hospice with my late father-in-law they walked the halls and followed the staff around. Didn't really see them in the individual rooms but the halls sure were busy. To put it mildly the silence was deafening in the place as the silent footfalls and shadows attracted your attention.