It can also equally be difficult even if you work from home, but have output monitored. I've worked in an office environment where people could easily get away

It can also equally be difficult even if you work from home, but have output monitored. I've worked in an office environment where people could easily get away with surfing the web 80% of the time, no big deal. I've worked from home where Subversion checkins are monitored daily. No checkin? Well what the heck are you doing from home then? =)