digital natives and the elevator twitpitch

i read this plea to ban employers trawling Facebook some time ago via a link through danah's blog, and while yes, i agreed to an extent, i didn't really think long and hard about it until elevator (twit)pitches arose.

now, i do think twitpitches can be useful. i like the simplicity, the conciseness, the mandate for effectiveness and efficiency. it does not allow for fluff but instead lets the work (ie, a link) do the talking. this is, on the whole, a brilliant idea--especially when aimed toward those who know well enough to craft themselves online; those who know and expect their online 'persona' to affect their working world.

but what about the up-and-coming folks, the "digital natives" as the phrase goes? they were not considering the twitpitch (and all that follows) when they were journaling online at age 13, sneaking into frats at 16, or generally doing "self-exploration" that they may not later wish to admit to (especially when some sites, like Facebook, make it so hard to delete the tracks later on).

as the article i first link to states,
“A world where even a 14-year-old has to think twice before posting an adolescent poem suddenly looks very unappealing and increases the pressure on children and young people to conform to a set of tightly focused adult norms.” (excerpt)

i recently asked my twitter followers this question;
@luckthelady was nice enough to respond, saying that:
To a degree, certainly. I definitely wouldn't hold it against a girl if she got drunk at a frat party, but...
If she's considered to be dishonest, a repeated flake or someone with a bad reputation, it would definitely affect the offer.

do you agree? disagree?
what do you take into account in your employment decision when "e-searching" someone? how well do you expect them to "cover their tracks" (or do you expect at all)? do you think this is unfair to begin with and puts digital natives on an uneven playing field with their more-crafted, older brethren?

and, my question also: how do you determine if someone is a "repeated flake" (for example) online? ie, what if they simply don't check Facebook in particular a lot? or how to measure this over the span of 4 years on Facebook? at what point is social media, aimed at friends, no longer about personal facts but professional representation?

i have questions. i'd be interested in any answers.