Anonymity

Anonymity of "sperm donors" is especially harmful.

"Sperm donors", clinics, and recipient parents may be able to deceive themselves about the importance of a father in a person's life, but by encouraging anonymous "sperm donation" they are preventing the donor-conceived person from deciding for him- or herself whether or not it is important.

It is hugely dangerous to use an anonymous "sperm donor", because the person created as a result will have no redress at all with regards to finding what may be a very important person in his or her life. If you were considering anonymity, please read Why anonymity?.