Fencing properties

[Cory Morris]

I just took over an 8-plex and a 4-plex right next to each other.  I'm thinking of putting a fence around the two properties to make them more family friendly.  I noticed that no other apartment buildings in town have fences, and when I think about it, I can probably count the number of apartment buildings with fences I've seen on one hand.  Is there a reason so many 4- or 8-plexes don't have fencing?