I don't know how likely it is, but there's a risk that this could backfire: > Most people who decide to donate less than the default will probably feel slightl

I don't know how likely it is, but there's a risk that this could backfire: > Most people who decide to donate less than the default will probably feel slightly bad for doing so. If the default amount is too much for me, then my choices are to donate less and feel slightly bad, or not donate at all. It will be pretty tempting to keep my money, rather than give some up and feel guilty anyway. Paradoxically I might even feel less guilty for not donating, because that's a passive act and I can tell myself I'm only postponing the decision, rather than definitively making an ungenerous choice.