Bad Communication by Doctors Without Borders

Doctors Without Borders, also known as Médecins Sans Frontieres, announced that they had already reached their budget for the disaster relief caused by the waves in the Indian Ocean and that any further contributions to their organization should not be designated as only for that operation. Although I really like their organization, I found this to be a particularly bad move. You would think that a bunch of doctors would realize that it is a bad move to send the message, "We already have enough money for project X." It would just be too easy for the last part of that message to get lost in translation or for someone to mistake another organization for theirs and not provide a donation because they think that they heard it does not need any more money. What they should have done is communicate the message directly to their donors that any contributions would be better spent on their general operating budget than on one disaster relief program that is already particularly well funded. As far as I am concerned, they are trying to be too good.

What kind of people donate money to an aid organization and say that it can only be used for one particular project? Do they think that disasters elsewhere in the world are less important?