I have a comment for both subjects in this thread. Paranoia propaganda out of the way first.
The Big Bad companies don't want your individual information. No one can really steal your DNA identity, and what good would it do anyone anyway? The collection of information comes from groups of people who live in cities and states,and countries even. The point is to find the common "probability" of certain health issues ahead of time, and sell that report to the Pharmaceutical companies and Insurance guys so that they know what drugs to beef up for the future etc. There is nothing in the United States that is done out of fun fluff. There are a number of articles written from legitimate Journalists about the FDA problems encountered mainly with 23andme about this situation. Drug dealers don't care about YOU as an individual, they care about how to make money off the the people who take their drugs as a whole. The prediction factor is brilliant, and kudos to whoever had this money making light bulb switch on in their brain.
Personally, I don't care what they get out of it, because I am getting what I want out of the deal as well, an answer to who my family REALLY is. The BEST part of it all? I get the same information that the BIG BAD's get, only it is more personal. When I get the data print-out, I get my OWN predictions, not the county where I live's predictions as a whole. Pharma pays for percentages, YOU pay Promethese (sp?) to do the same thing for you. So really, there should be no complaints and hiding inside our houses watching out the windows like someone who misused the "witch's brew" that BIG BAD sold to them, waiting for some genocide to happen to all test takers of DNA for ancestral purposes, or somebody to steal the heritage information or invent some strange claim to some obscure relative of yours who had money in 1653, but nobody who is related now can even afford rent in a single bedroom apartment in Delaware or somewhere, to come to your house and mess with your insurance. Give me a break. If you want to talk about how insurance is going to mess with this nation, I'm sure there a jillion and one websites all about social security that are free to join. THEY have everything about you that ever happened to you, ever, if you have a SSN and wrote it down somewhere, so DNA testing companies are hardly to be feared. I never gave Ancestry my SSN- so, WHEW!
As far as I know, these big company's test results are not even held up in a court of law for paternity validation, because they were not administered by a qualified physician. (Unless you arrange for this ahead of time). All your personal information is online on this site, and any other genealogy website you put your family on, anyway, paid or free. Then, If you REALLY want to get paranoid, your DNA can be INVENTED by reverse triangulation! Just find all the people related to you that have taken DNA tests, and put it all together into your own modge-podge version of the person that suspicious pharma company wants you to be, so they can deny you health care.
This same subject comes up over and over and over, and it is extremely exhausting. Take the test or don't. If you are afraid of bio-theft, then don't take it. Simple.
And as for the the initial question at hand, If there was a search field similar to the one on AncestryDNA, but with a million other fields, just like when doing a regular record search. I have every single person under the sun who has the same sur names in their trees, and so on and so on, and how many Johnsons and Cox, and Bates, and Adams, and Carvers, and Kennedy's need to be in every single tree ever? So, the sur name search option is almost useless without a first name field, or a married to, or a DOB for the person you are searching.
How about a Chrome search option? Like search for Chrome 12 within these boundaries- then add your numbers you want. THAT would be handy-dandy! Also, a rule against user names and married names. ONLY the name given at birth, along with another field for the name of your spouse. Really, you look at your matches, and you wonder- WHO ARE ALL THESE PEOPLE????? Or get all excited like me, when I come across my one obscure name, but then it turns out that the person who holds that name isn't even a match to me, it's some lady's ex-husband. *not applicable to adoptees who don't know, and should have their own field for just that purpose.
Name at birth, married name, adopted name. Or just, the paper-trail name.
I just wanted to give my 2 cents. I am not a genealogist, and I only got my DNA results in April of this year, so I have had to learn a lot at a rapid pace if I wanted to get anything out of what was handed to me without any explanation. I am just learning this site, and try to visit and work on my tree for at least 10 minutes a day to 5 hours a week- and spent today's time ranting instead of trying to fix the duplicate grandfather I made yesterday. Sorry. No one else is trying to claim him via DNA or imaginary lineage yet either, so I feel ok about this choice. There are a bunch of busy "corrector bees" on this site, I'm sure the thank you will be headed in your direction shortly. :)