:)
There are also many other distributed computing porjects like seti@home (involved in the analysis of signals picked up from space) and fightaids@home.
It happens some times if the server is down for maintenance. As long as you can get another WU you don't have firewall problems. The completed WU will go eventually.
Someone who is used, or lets himself be used, for a purpose and despite personal feelings that what is being done maybe wrong or immoral.
I.E.
At work I feel like a total tool.