I agree with Miss Management, but my query was not because I want a trip in the jumpseat, I'm just as happy in-back as sitting up front!
Not being a pilot though, my curiosity was merely to do with what the actual official line on this question is. Post-911 there seemed to be a whole raft of new regulations introduced governing cockpit/jumpseat access, with the main one apparently being an FAA ruling that the only non-pilot type personnel allowed to travel in the jumpseat were currently licensed flight engineers and ATCO's! Haven't been able to either confirm or debunk this, and was wondering if anyone could enlighten me, please.
As regards family in the jumpseat, I should think that if your relationship with a relative was so bad that they could be considered a liability, then you really shouldn't be bringing them to work in the first place!!