Three good reasons to have some stuff with you on the plane.

1) You will land - planned or un-planned and you will and at that time, you will be in the same situation as before you took off (or worse) If carrying a bit of survival gear at all times make sense then it make sense. Otherwise don't bother with this forum, and topic.

2) If you land in an un-planned place or fashion and survive the landing (which occasionally happens) then having some survival gear with you may be critical to prolonging your suffering untill your isolation ends and the professionals can take over.

3) You carry on travel necessities because you don't want to wait for the checked luggage or risk the carry-on travel necissities to the vagaries of the baggage handling process. If your candy box of trinkets makes you feel good then why not carry it.

OTOH, if your PSK is only a candy box full of trinkets then I suspect that either you haven't the training and experience to understand the utility of your tools or you haven't selected to fill your PSK with quality items.

Reasons to take offense at airport security

1) I hate being told what to do

2) I hate feeling my liberties restricted
(BTW the airlines are private and private rules apply. The won't give me the liberty to carry knives or to fly the plane - Durn it!)

3) I hate having to depend upon someone else for my safety and security
(BTW more people die in airliners because of human failure in the staff of the airlines than do from terrorist events - who's protecting me from that?)

4) I hate being hasseled and delayed

5) I hate being treated anonymously and humiliatingly

My Airline PSK includes, but is not limited to, a bottle of wine and a CD <img src="images/graemlins/wink.gif" alt="" />