[EGreg]

I guess it's just my programming instincts, but I just immediately think of the possible worst case scenarios and how strong are the guarantees they're prevented.

Dividing by X? I immediately think what if X is zero. Dereferencing X.Y ? I think what if X is null / nil. And so on.

So when it came to the DNA, I was hesitant to do it, since your DNA can wind up in all kinds of databases. And it turns out I was probably right.

What you could have done is sent in the information anonymously, or under a fictitious name. You can still use an email address and log in and see the results. Or you could use someone else's name from another country (with their permission), but then if that person ever gets in trouble, the DNA evidence might somehow implicate you (such as the guy with the last name NULL who got a lot of parking tickets LOL). A couple months ago I actually did submit with heritage.com and 23andme for a friend, so I think there was no place where you had to provide ID or something.