Josh said:
Why not just uninstall them?
...the employees, that is.
i.e. have a policy which says no MSN chatting in working time,
disciplinary action if policy breached.
You can block access to MSN's chat servers at your firewall, but there
are ways people will get round them (e.g. using web gateways into chat
systems). If you allow your employees any access to the Internet, there
will always be ways they can waste time on it. And if you block it,
they'll just MSN-chat or facebook on their mobile phone.
I don't see how this topic has anything to do with the Ruby programming
language.