Guilt in Omelas?

Having read Ursula Le Guin's "The Ones Who Walk Away From Omelas" I have come to question the concept of guilt. Is it truly possible for one to feel constant guilt about the misery of others? Personally, I don't believe it is. Some people think that guilt stays in the back of your mind nagging at you. However, guilt is such a strong feeling that it can't stay locked up in the back of ones mind. Guilt washes over people and engulfs them like a tidal wave so it cannot simply remain in a confined space. When I am watching TV and a commerical comes on about children in Africa I feel guilty. I feel horrible about sitting there with all my privileges while someone in the world is striving for a drop of water. However, that guilt is not constantly present with me. I get preoccupied with other things and forget about whatever was troubling me a moment ago. Out of sight out of mind. I know that it sounds horrible but its true, or at least in my case. Some people may not find that true, but they probably have another way to expel the guilt. As Le Guin mentions their is no guilt in Omelas. The people that come to meet the child either walk away from Omeals or cope with the mistreatment of the child. They find multiple ways to justify what they are doing. Some people reassure themselves that they are doing what is best for the community as a whole. Others dehumanize the child by calling it primitive and imbecile questioning its ability to feel joy. These are simply excuses used to eliminate the guilt that they feel for the child. Many of us use this technique when we feel guilty about something. We would find excuses to justify any type of behaviour. Our justification of this behaviour allows us to not feel any guilt. Our brain expels guilt no matter what. It is an unpleasant emotion and we do whatever is necessary to get rid of it. No one can constantly feel an unpleasant emotion such as guilt.