This would have to be modified for implementation across all trilogy sites so would need a little reworking (they share the same code base, someone correct me if I'm wrong).
But I also don't see the need to implement. We see new sysadmins on SF all the time (frequently as evidenced by the question content itself). It's very infrequent that I look at someone's profile before answering a question and as such I would rarely, if ever, see that "I'm a new sysadmin" checkbox.
If you look at the # of views of SF profiles of some of even the highest rep users, they're really not all that high considering it's been 8 months since the site launched. Mine's barely eclipsed 1000 in 8 months, as have the rest of the first couple of columns on the user page (except Evan and splattne who are only up past 3K). I don't see that it's really going to help you based on the data...