Isn't that what Facebook, MySpace, Google+ is for? Wikipedia is trying to collect all of human knowledge. They are trying to hold themselves to a higher standard than a site like Facebook.
Readers are poorly served by a one-line biography for somebody obscure, and even more poorly served by the typical marginal biography, which is a couple paragraphs of poorly written cruft sans citations.
Subjects are poorly served by shaky biographies because suddenly the top search result is a couple of semi-random sentences covering the few things that happen to be verifiable about them.
For example, when you search for my mom's name, the top result is her obituary. I carefully wrote it in consultation with the family to give a balanced view of her life, so I'm happy to see it there. But suppose there were a Wikipedia article about her. If you went and pulled all her public records, I think you'd get a) her birthdate, b) her bankruptcy, c) her real estate broker's license, and d) the times she was the victim of a crime. I would hate it if she had an article in Wikipedia, because nothing that really matters about her life would be a part of it, and if I tried to put it in I'd (correctly) get [citation needed].
But you probably don't want Facebook because it just doesn't have the same status that Wikipedia has, right? (i.e. Most Facebook pages are junk) Wikipedia did not achieve a high status by letting somebody's teacher have a page (No snark intended), and there lies the rub.
If Wikipedia lowers their standards then that means that your teacher will get her page along with a lot of spammers. Right now Wikipedia is quite good, if they open the gates the spammers will ruin it.
There would still be policing, but now it's of the form "This article on Bletchley Park shouldn't link to this random guy's page" which is more objective than giving me a notability score.