speed demond,
pilots are not saying they do not want to be screened/ have baggage checked. what they are saying is they want to be able to take a juice on board so they can drink it during the day.
on some airlines like ryanair, if crew want to have a sandwich and a drink, they have to pay full price like the pax.
other crew have stop overs. they may only be one or two nights so why bother packing the sink and then having to wait for it to come out at baggage claim. why not just take a small bag on board with you and once you land you go to the hotel without delay. crew get 8 hours rest. but then they have to travel to and from the aircraft in that time as well. every extra minute you have in bed helps.
yes screening was not done well on that flight you stated (i believe its the fedex flight your talking about), but as someone has already stated here, when bags are screened why are the security staff chatting away?
crew complain about having silly things like the knife you get on board to eat with si taken off them at security.
with bottles, fine you get a tamper proof bag when you buy your bottle of bacardi, but a tamper proof bag will not help anyone when you rip it open at 33,000ft, take the cap of the bottle and stuff a napkin down the neck. hey presto you have yourself a bomb which you can light with the safty matches you carry on board with you, which are allowed.