It's really interesting that when many terraces were first built, there weren't any fences at all, and very often a path between the gardens that ran the length of the terrace.
Lots of Victorian terrace gardens are still all bisected here in Norwich, and our bit of the row have low chainlink fences still. It's nice. But then our neighbours aren't bastards (mostly).
I suppose I'd rather do it my self as they're are only 6' high at the moment and the rest which the council have done are 8'.
Where I grew up the back garden fences were about 3' and you could look down the row of gardens, much nicer and communal.