I think bitcoin is ideal for charity. But there're many predicaments.
First of all, how to prevent others modify bitcoin receiving address when reposting? (it happened when I called for "help lushan donation"
https://bitcointalk.org/index.php?topic=181336.0 )
Secondly, in most cases, charity fund has to be exchanged into a specific currency (other than virtual currency such as BTC or LR) to put into use. How to determine the exchange rate?
Thirdly, what should be the criterion to verify a charity not a scam?
Any suggestions? please help me.