It appears that he wants to sue the charity because of the following logic:
1. Indiegogo is incorporated in California.
2. It appears that under Californian state law that to collect money for a charity you must register to do so.
3. The charities were informed of the fundraising efforts, and as no paperwork had been filed they have the authority to shutdown the fundraising efforts.
4. The charities have refused to do so, therefore for some reason they are liable for the campaign.
1. Indiegogo is incorporated in California.
2. It appears that under Californian state law that to collect money for a charity you must register to do so.
3. The charities were informed of the fundraising efforts, and as no paperwork had been filed they have the authority to shutdown the fundraising efforts.
4. The charities have refused to do so, therefore for some reason they are liable for the campaign.
(Reasoning taken from here: http://www.ramblingbeachcat.com/2012/06/not-backing-down-ram...)