Online breast milk

No it isn't, it's like buying cows milk online.

No one said that was a good idea, either. Think about all the hormones and bacteria that's in that!

and yet it's consumed by the majority of the non-lactose intolerant world daily.

Breast milk can be stored safely while frozen for about 6 months. It's still probably better to go through a reputable organization than done random person though.
Dark, I think song meant that there would be bacteria from improper storage and handling, not just because it's milk. Although, I do think song is a vegan.