Good point. Perhaps we should take it one step further and simply send donations in BTC whether the target officially accepts them or not. Good use case for coinapult. If I remember correctly they return unclaimed funds after 30 days. But it would be a good idea to synchronize so everyone who wants to support a given cause would do so at once,  providing a significant incentive for the receiver to claim the funds.

Perhaps we could do the same thing with online stores. If you want to buy something from them with bitcoins just send them the coins and a message explaining what item you would like and where it should be shipped etc. Of course you run the risk that they take the coins without shipping the item, but you would be in much the same position even if they officially accepted bitcoins.