The case of the British couple who had their daughter tested for the presence of mutant breast cancer genes is not representative of all genetic testing for breast cancer genes. This case involves pre-implantation diagnosis, and if the child was carrying the mutant alleles for the breast cancer genes, the only option to avoid having a child carrying the mutations would have been to abort the foetus (or carry it to term, but knowing that it carried the mutant alleles). But this isn't the usual way of testing for mutations in those genes - I could go and be tested tomorrow, and from what I understand it would involve a blood sample (see for details on testing for the breast cancer genes). Granted, a saliva test would be easier than a blood test, but all in all they're both far easier than the pre-implantation diagnosis carried out in the referenced articles (Slashdot article and the orignal article from the BBC).
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