I've been thinking about this lately as well. I would like to be able to help someone, but it would only be close friends or family. I also would like to know the baby growing up and offer BF or EBM to make sure it receives the benefit. I would hope the mum I was doing it for would try to start lactating so she could take over the BF duties, it would help with the bonding I think.

As others have said, checking out the laws and having a lawyer right up the agreement would be the best way to do it.