I agree with you on this, but normally having a baby doesn't create the risk of mixup (It is EXTREMELY rare.)
From what I gather from the article the man wasn't a sperm donor. He was a man that went with his wife to a clinic and wanted his wife impregnated not this other woman.
My point is that he should have a contract with the clinic that this would not happen. If it happens, the clinic is in violation of the contract and must compensate him. I just don't think he should be allowed to wreck some family because of the problem.
I have a rule I try to live by.....
"If you do not want to father a child, don't deposit your sperm in locations likely to result in a pregnancy. Women and fertility clinics are two such places."
I actually know two different people whose babies were accidentally given to other moms in the hospital. It was only temporary -- in one case the nurses noticed the mistake based on the armbands, and in one case the gender was wrong. However, in both cases it appears that other moms nursed my friends' babies for a few minutes. Creepy, eh?
Back on topic -- something doesn't quite add up with this article. It claims that Doe tested pregnant the day after her insemination. That's impossible, because even blood tests only show up positive after the embryo has a chance to implant and start releasing hormones (and that takes a few days). Weird. Maybe I'm reading something wrong.