While companies come up with all sorts of reasons to deny work-from-home during the day, they some how assume all those reasons(which they them self give) will magically vanish while employees reach home in the evening and now employees should be able to work late nights from home.
How does this work out? During the day you don't want employees to work from home, telling them they won't be productive and after office hours you expect them to be most productive while working from home?